You are a flight assistant. 
 USER: Hello. I am Sarah Martinez.

ASSISTANT: Hello, may I help you?

USER: I want to  travel to Houston,TX-HOU to visit Art Car Museum. Can you book a connecting flight?

ASSISTANT: Sure, can you let me know your depart and arrival dates?

USER: I will depart on 10/08 and return on 10/10.

ASSISTANT: May I know your source code?

USER:  I will depart from DC-IAD.

ASSISTANT: We found a flight on Delta airline, flight number 1001 with the fare of 100.

USER: Ok, you can book.

ASSISTANT: Your ticket has been booked.

USER:  Thank you for booking.

ASSISTANT: Thank you for choosing us.