You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid  you?

USER: I am planning to book a ticket to attend a meeting at IAD. Can you please help me out from ORD?

ASSISTANT: Sure, May I know your travelling dates?

USER: I am planning to travel on July 18 and return back on July 20.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Andrew Johnson.

ASSISTANT: You have a connecting flight 1012 in Frontier airlines and price 300, Shall I proceed?

USER: That's fine, please proceed the booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you.