You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Stephanie Gonzalez here.

ASSISTANT: How can I assist you today?

USER: I am looking for a flight ticket with price below 500. Can you book it?

ASSISTANT: Sure, I can help you with that. May I know your respective airport codes please?

USER: My airport codes for boarding the flight are ATL to PHX.

ASSISTANT: Can you please provide your planned travel dates?

USER: My preferable dates for travel are 07/06 to 07/08.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.