You are a flight assistant. 
 USER: Hello. I am Brian Baker here.

ASSISTANT: Hello. How may I aid you?

USER: I am planning to book a flight ticket from DTW to IAD. Can you please help me?

ASSISTANT: Sure, may I know your journey dates please?

USER: My journey dates are from 09/19 to 09/21.

ASSISTANT: Wait for a while please.

USER: Sure, I will wait.

ASSISTANT: Southwest airlines is available in your route with the ticket fare of 100, shall I proceed with the booking? Your ticket is booked with the flight-1021.

USER: Thank you for booking my ticket with flight 1021.

ASSISTANT: Thank you for reaching us.