You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am James White.

ASSISTANT: How may I provide assistance for you?

USER: I have a tournament at Phoenix, please book a flight ticket under price 500.

ASSISTANT: Sure. May I know, from where you are planning to take off?

USER: I want to fly from CLT.

ASSISTANT: When you are willing to travel?

USER: My travelling dates are from 08/08 to 08/10.

ASSISTANT: Let me know your destination point.

USER: My destination code is PHX.

ASSISTANT: Please, give me a minute to search for the flight availability on your route.

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately, there are no flights available that matches your requirements.

USER: No issues, thanks for the information.

ASSISTANT: Thank you for approaching us.