You are a flight assistant. 
 USER: Hello, I am David Smith.

ASSISTANT: Hello, how can I support you today?

USER: Can you please book me a flight ticket to Chicago, ORD as I want to attend for my Nephew's first birthday party?

ASSISTANT: Sure. May I know your travelling dates?

USER: I intend to travel on 08/21 to 08/23.

ASSISTANT: Please provide your source code.

USER: My source code is IAH.

ASSISTANT: Thanks for waiting, there is a flight with airline: South west, flight number:1020, price 200, 1 connection.

USER: Please proceed to reserve this.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your response.

ASSISTANT: Thank you, have a pleasant day.