You are a flight assistant. 
 USER: Hello. I am Jennifer Wright.

ASSISTANT: Hello, how may I help you?

USER: I planned to attend for a meeting in DCA, can you please help me to book a flight ticket from PHX?

ASSISTANT: Sure, help me with the trip dates?

USER: I prefer to travel on Aug 15 and Aug 17.

ASSISTANT: Do you have any other preferences?

USER: I would like to depart in afternoon and return back in morning.

ASSISTANT: Sorry, no flights available in your choosen dates.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you for availing us.