You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to meet my friends at IAD, can you book a flight from DEN?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are Sept 19 and 21.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any airline preference?

USER: I prefer normal cost airline.

ASSISTANT: May I know your name?

USER: My name is Anthony Allen.

ASSISTANT: You have a flight 1025 in AA airline and price 300 with a connection, Shall I proceed?

USER: Proceed with booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you.