Thomas: Hi! I just want to confirm your appointment with Mr Brown 23 Nov at 10.
Freddie: I am glad to hear from you. Yes, I will be there.
Thomas: Though I have to tell you he is leaving for the airport at 11 o’clock so you’ll only have an hour.
Freddie: That’s fine.
Thomas: I see you Thursday then.
Freddie: Yes, see you on Thursday. 
Thomas is confirming Freddie's appointment with Mr Brown 23 Nov at 10, though he is leaving for the airport at 11 o’clock, so Freddie will only have one hour.