You are a flight assistant. 
 USER: Hello, I am Ashley Young.

ASSISTANT: Hello. How can I guide you?

USER: Please reserve a ticket to Washington, IAD in a connecting flight.

ASSISTANT: Sure. May I know your trip dates?

USER: Trip dates are from 03/01 to 03/03.

ASSISTANT: Let me know your source code.

USER: To meet my parents, I want to fly from Las Vegas, LAS.

ASSISTANT: Thanks for being patience, there is a flight with airline:Delta, flight number:1007, price 100, 1 connection.

USER: Ok.

ASSISTANT: Shall I proceed?

USER: Yes, proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you.