You are a flight assistant. 
 USER: Hello. I am James Clark.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to visit Charlotte to meet my father, can you please help me in booking a flight ticket from MSP to CLT?

ASSISTANT: Sure, can I know your planned travel dates?

USER: My travelling dates are Nov 15 and Nov 17.

ASSISTANT: Ok, please wait. I will check the availability of flights on your preferable travel dates.

USER: My departure time is afternoon.

ASSISTANT: Ok. Sorry, there were no flights available on your preferable travel dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for contacting us.