You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Betty Green want to travel to DC-DCA to attend a meeting with clients. Can you book a ticket from MI-DTW?

ASSISTANT: Sure, may I know your travel dates?

USER: My travel dates are 06/21 and 06/23.

ASSISTANT: How much you can afford for this ticket?

USER: I can afford  up to 200.

ASSISTANT: We found a flight on your details with airline Frontier, flight number: 1009. Shall I book this ticket?

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been booked.

USER:  Thank you for booking.

ASSISTANT: Thank you.