You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I would like to travel TX - HOU from AZ - PHX.

ASSISTANT: Ok, on which dates you want to travel?

USER: My travelling dates are 12/14 and 12/16.

ASSISTANT: Ok, may I know your name please?

USER: I am Ryan Carter.

ASSISTANT: Sorry, no flights found as per your planned dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you.