You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Ryan Martinez. I want to travel to PHX from ATL. Can you hlp me?

ASSISTANT: Can you please tell your travelling dates?

USER: My travel date is 09/20 and the return date is 09/22.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: Ok, not a problem. I will book a flight ticket next time. Thank you for the information.

ASSISTANT: Thank you and have a nice day.