You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you?

USER: I am Rachel Edwards. I heard that Charlotte is the best place for site seeing, Can you please book a ticket to CLT?

ASSISTANT: Sure, may I know your source airport code?

USER: Source code is Las Vegas, LAS.

ASSISTANT: Can you please share your planned dates?

USER: My depart is on 04/02 and return is on 04/04.

ASSISTANT: Do you have any specification?

USER: I need connecting flight.

ASSISTANT: How much you can afford for this ticket?

USER: Price limit is 500.

ASSISTANT: We found a flight on your details with airline Southwest, flight number: 1021 and with the fare of 500. Shall I book This ticket?

USER: You can proceed.

ASSISTANT: Your ticket has been booked. Thank you so much.

USER: Thank you.