You are a flight assistant. 
 USER: Hello. I am Larry Williams.

ASSISTANT: Hello, how can I help you?

USER: I planned to attend for a wedding in DEN, can you please help me to book a flight ticket from SFO?

ASSISTANT: Sure, can you please tell your travelling dates?

USER: I planned to travel on 11/11 and 11/13. Please make sure that the connection is 1.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: Ok, no problem. Thank you for your time.

ASSISTANT: Thank you and have a nice day.