You are a flight assistant. 
 USER: Hello. I am Sarah Miller.

ASSISTANT: Hello, how can I assist you?

USER: I would like to attend my cousin's wedding at San Francisco, CA - SFO. Can you please help me to book a ticket from CLT?

ASSISTANT: Sure, please provide me your planned dates.

USER: I have to depart on 12/03 and return on 12/05.

ASSISTANT: sorry, there are no flights with your requirement.

USER: Ok, it's not a problem. Thanks for your quick response.

ASSISTANT: Have a good day.