I live in country "A" (in Europe) and, a couple of months ago, I bought a round trip flight ticket to the US, for family reasons (not tourism). A couple of weeks after I bought the ticket, I was invited to a job interview for a postdoctoral position in country "C" (also in Europe) by a university.

This interview was scheduled a few days before my planned travel back from the US to country "A." The tone of the email they sent me was such as to make me think that there was no room for moving the interview by a few days (or even by a few hours...). They just told me the date, hour, and room. In my experience this is unusual: I have been invited to interviews from institutes in other European countries (both tête-à-tête interviews and Skype interviews), and I was always given a few alternative dates from which to choose. Bear in mind that Europe is not a country--and is not the US, there are very many different ways to communicate, which caused my uncertainty in how to interpret their message.

Perhaps, if I would have explained my situation, they would have understood and re-scheduled the interview...or perhaps they wouldn't have bothered, whatever their reason might have been.

So, instead of asking the university to re-scheduling the interview, I have bought a new one way ticket back from the US, so that I could make it on time for the interview. (I am not asking judgement of this action)

I am very interested in this job, and I think I should let them know what I have done to make it to the interview. (I am not asking whether I should let them know it or not. I am asking opinions on how to let them know it to obtain a positive effect)

What is the most elegant way to let the recruiting committee know--on the day of the interview--the what the applicant (me) has done to make it to the interview? (this is the question)

[I am literally marking as useful all of your answers, however opinions from people from different European countries are very appreciated. The reasons being the different nature of social interactions compared to the anglosaxon world.]

[NOTE: I believe now the question is precise, I would appreciate if you answered the question, and not judge everything else]

[NOTE 2: I have changed some tags in this question, with the hope that future commenters or "answerers" could benefit from it. Remember this thing: what is normal or not in your country might be non normal or normal in another country. E.G. in the US it would be extra rude for the interviewer to ask the candidate a question about his/her family, however this is not true elsewhere: it was one of the first questions I received in an interview with a french university. Please, before commenting - answering with a pretentious / sarcastic / paternalistic tone, be aware that the world is big. The question is not flawed, only insisting that it is without having any knowledge of what there is out there is flawed. I give you another example of how the world is big, beautiful and rich of differences and how lack of knowledge about the existence of such difference in social interactions might appear clumsy. E.G.2 Say we are in the US and a Texan asks to some people at his BBQ: "What sauce should I put on the cow steak?" and a random guy from India who was walking by answers: "You should not eat cow, that is very inappropriate". It is a legitimate answer to be respected, but it is out of context. I feel like the Texan guy reading some comments and answers.]

[NOTE 3: Given all the above, let me stress that I appreciate all of your answers, but please try to answer / comment only if you have something appropriate to add. Answers that says somethings along these lines: "I am Australian, but am being living in South Korea, so I know what I am talking about" represent an example of flawed answer.]