You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to visit Austin to meet my friend, please book a ticket from IAD to AUS.

ASSISTANT: Sure, may I know your respective dates?

USER: My trip dates are 03/18 and 03/20.

ASSISTANT: May I know your name please?

USER: My name is Jack Collins.

ASSISTANT: There is a flight with the connecting flight of fare 100, are you ok?

USER: Please book my ticket.

ASSISTANT: Your booking is done with the AA airline.

USER: Thank you for your assistance.

ASSISTANT: You are welcome.