You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Rebecca Wright here.

ASSISTANT: Rebecca, what can I do for you today?

USER: Please book a ticket from BOS to PHX, to meet my family.

ASSISTANT: Sure, can you please let me know your trip dates?

USER: I will be travelling on 09/10 and 09/12.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry Rebecca, no flights available on your preferred dates.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you very much for choosing us and have a nice day.