You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Christopher Thomas.

ASSISTANT: Christopher, how can I assist you?

USER: I would like to visit NASCAR Hall of Fame in Charlotte, could you please help me in booking a flight ticket?

ASSISTANT: Sure, can I know the details of travel?

USER: I want to travel from DFW to CLT. The dates are 11/19 and 11/21 respectively.

ASSISTANT: Spirit airlines flight 1021 matches with your preferences, can I proceed?

USER: Please make sure that price should not exceed 200.

ASSISTANT: It matches perfectly.

USER: Ok, please book the ticket.

ASSISTANT: Your ticket is booked.

USER: Ok, thank you for your time.

ASSISTANT: Thank you, have a great journey.