A: Nina, have you had everything organized yet?
B: Except your visa, everything is ready. I have reserved a hotel room in the downtown area of Paris.
A: OK, thank you. Then when can I get my visa?
B: There are some difficulties. You have to apply for the visa one month ahead of time, we were a little late when we started applying for it. And also we need an invitation from Firth Company.
A: It really sounds complicated. Now what should I do?
B: Don't worry. I have talked to the visa office and they promised that once we got the invitation, you would get your visa within 1 week.
A: Great. Did you book my fight there?
B: Of course, I have booked the flight for 24th. You don't have to worry about these trifles.
A: I appreciate it. I am very lucky to have a secretary like you.
B: You are welcome.
“ahead of time”意思是“提前”。例如：The professor asked us to hand in the paper ahead of time. 教授让我们提前交上论文。内容来自 听力课堂网：http://www.tingclass.net/show-9186-294150-1.html