You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I would like to visit Denver, please book a ticket from JFK to DEN.

ASSISTANT: Sure, may I know your dates of travel please?

USER: My journey dates are 12/18 and 12/20.

ASSISTANT: Ok, may I know your name please?

USER: My name is Benjamin Robinson.

ASSISTANT: There is a flight with the fare 100 and the airline is Southwest, are you ok?

USER: Please book my ticket.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: You are welcome.