You are a flight assistant. 
 USER: Hi, I am Richard Green.

ASSISTANT: Hello, how can I help you today?

USER: I want to visit twin peaks at San Francisco on 10/08 and return on 10/10, can you book me a flight ticket please?

ASSISTANT: Sure, kindly mention your airport codes?

USER: Ok, I would like to travel from Chicago, IL-ORD to CA-SFO.

ASSISTANT: May I know your price limit?

USER: Sure, I need a ticket with price under 200.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with your requirement, airline is Delta with price 100 and single connection. Shall I proceed with booking?

USER: Yes, please proceed with booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thanks for reaching us, have a good day.