You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Melissa Wilson here. Can you please book me a ticket to Phoenix within price 1000?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: Sure, I am going to PHX from CLT.

ASSISTANT: When are you willing to travel?

USER: My journey dates are 10/12 and 10/14.

ASSISTANT: Thanks for providing your travelling dates, no flights are available with your request.

USER: Ok, no issues.

ASSISTANT: Thanks for opting us.

USER: Thank you.