You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I give assistance to you?

USER: I am planning to meet my husband at San Francisco, Can you please book a ticket on 12/11?

ASSISTANT: Sure, I will help you. May I know your name?

USER: Sure, I am Kenneth Young.

ASSISTANT: When do you want to return back?

USER: I intend to return on 12/13.

ASSISTANT: Can you provide your origin and destination airport codes?

USER: My origin is Oakland, CA - OAK. My destination airport code is CA - SFO.

ASSISTANT: Ok, please hold on.

USER: Sure.

ASSISTANT: Thanks for being on hold. We did not find any flights on your requested dates.

USER: Ok, Thank you for providing information.

ASSISTANT: Thanks for reaching us.