You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jason Parker.

ASSISTANT: What type of service your are excepting from us?

USER: I am planning to book a ticket to attend a meeting at PHX. Can you please help me out to book a ticket from HOU?

ASSISTANT: Ok, please can I have your planned trip dates.

USER: I would like to travel on 12/16 and return back on 12/18.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry for the trouble, there are no flight's available based on your travelling dates.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.