You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Anna Johnson.

ASSISTANT: How can I assist you?

USER: Can you please book a direct flight for me to San Francisco, SFO?

ASSISTANT: Sure. May I know, from where would you like to take off?

USER: My take off airport code is  Chicago, ORD.

ASSISTANT: When would you like me to book your flight ticket?

USER: My journey dates on 10/29 and 10/31.

ASSISTANT: Thank you for sharing the details, wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: There is a connecting flight of Spirit airline available with fare 200 and 1021 number. Shall I confirm it?

USER: No, do not proceed.

ASSISTANT: Ok.

USER: Thank you for your information.

ASSISTANT: Thank you for approaching us.