You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Janet Turner from Washington. Can you please book a flight ticket from IAD to PHX?

ASSISTANT: Sure, can I know your travelling dates?

USER: Thank you, I want to take off on Jan 13 and please confirm my return ticket also on Jan 15.

ASSISTANT: Sorry, there are no flights are available for given dates.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.