You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephen Lee.

ASSISTANT: How can I serve you?

USER:  I'm planning to visit New York, can you please help me in booking the ticket from CLT to JFK?

ASSISTANT: Sure. Can I know your travelling dates?

USER: My trip dates are Apr 21 to Apr 23.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: How much can you pay for buying your ticket?

USER: My fare is 500.

ASSISTANT:  Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure, I will be waiting.

ASSISTANT: We found a Southwest airline, flight number:1010 and the price is 100.

USER: You can book it.

ASSISTANT: Your flight ticket has been processed.

USER: Thank you for helping.

ASSISTANT: Thank you for choosing us.