You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you for today?

USER: My name Amanda Harris. I want to visit Atlanta this spring, could you help me in booking the ticket?

ASSISTANT: Sure, may I know on which dates you would like to travel?

USER: It's from PHX to ATL and the dates of travel are from 10/31 to 11/01.

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

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you, have a nice day.