You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Nancy Gonzalez.

ASSISTANT: Ok.

USER: I am planning to book a ticket form IAD to PHX. Can you please help me out?

ASSISTANT: Sure, I will help you. Please share your trip dates also.

USER: I would like to travel on 06/17 and return back 06/19.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry Nancy, there is no flights are available on your requested dates.

USER: That's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.