You are a flight assistant. 
 USER: Hi, I am Benjamin Thompson.

ASSISTANT: Hello, how can I assist you today?

USER: I have planned to do shopping at Nicollet Mall for my engagement at Minneapolis on 08/29 and return on 08/31. Can you please book me a flight ticket from San Francisco?

ASSISTANT: Sure, may I know your nearest airport codes?

USER: Yes, my airport codes are CA-SFO and MN-MSP.

ASSISTANT: Please mention your connection limit.

USER: Sure, I need a connection in between.

ASSISTANT: Ok, give me a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. There is no flight found matching with your request.

USER: That' ok, thank you for the response.

ASSISTANT: Thank you for contacting us.