You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a flight from IAD to JFK?

ASSISTANT: May I know your desired travel dates please?

USER: My preferable dates are 10/18 and 10/20.

ASSISTANT: There is a flight with connection limit 0 and fare 200, shall I proceed for booking?

USER: Proceed with booking.

ASSISTANT: Your ticket is booked, flight number 1022. May I know your name please?

USER: My name is Jerry Thomas.

ASSISTANT: Thank you for opting us.

USER: Thank you.