You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Kathleen Garcia here, please help me out in booking a ticket from IAD to PHX.

ASSISTANT: Ok, when you want to travel?

USER: Sure, my trip dates are 11/03 and 11/05.

ASSISTANT: Sorry, there is no flights available.

USER: Its ok, no problem. Thank you for giving information.

ASSISTANT: It's my duty. Have a nice day.