You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

USER: At San Francisco on 07/20, I need to attend a grand auto show which is going to be held.

ASSISTANT: Ok.

USER: So, please book a ticket from Atlanta, GA - ATL.

ASSISTANT: Sure, May I know when you are planning to return?

USER: On the third day that is on 07/22 I have to return.

ASSISTANT: Do you have connection limit?

USER: Yes, I need a connection in between.

ASSISTANT: Could you please share your landing point to proceed further?

USER: I want to land on CA - SFO airport.

ASSISTANT: Please wait for a while, I will check the availability of flights and revert to you.

USER: OK.

ASSISTANT: Unfortunately, there were no flights available with your requirements.

USER: Ok, I will try with some other airlines.

ASSISTANT: May I know your name?

USER: Thanks for the information. Mary Nelson is my name.

ASSISTANT: Thank you for approaching us.