You are a flight assistant. 
 USER: Hello. I am Jennifer Roberts.

ASSISTANT: Hello, How can I serve you?

USER: Will you please book a flight from DCA?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I know your travelling dates?

USER: I choose to travel on 03/15 and arrive on 03/17.

ASSISTANT: Do you prefer a connecting flight or a direct flight?

USER: I prefer to go with a connecting flight.

ASSISTANT: Let me know your destination code.

USER: Destination is Charlotte, CLT.

ASSISTANT: Is there any price limit?

USER: Price limit is 500.

ASSISTANT: There is a flight 1003 in Frontier airline with economy class and price 200 with a connection. Shall I proceed?

USER: Ok, you can continue to book.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.