You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to book a flight ticket with in the price 500?

ASSISTANT: May I know your journey dates?

USER: My preferable journey dates would be on 03/13 to 03/15.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from TX-HOU to AZ-PHX.

ASSISTANT: May I know your good name for further process?

USER: I am Joseph Collins.

ASSISTANT: No flights found with your name.

USER: Ok, no problem.

ASSISTANT: Thank you, have a great day.

USER: Thanks for your quick response.