You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joseph King.

ASSISTANT: Joseph King, how may I aid you?

USER: I have to attend a Live Concert at San Francisco, could you please help me with booking a flight ticket from CLT to SFO?

ASSISTANT: Sure, please provide your itinerary dates.

USER: I would like to depart on Aug 31st and return on Sept 2nd.

ASSISTANT: Please wait for a while.

USER: Make sure that my return time is evening.

ASSISTANT: Ok. Sorry, no flight is available in the evening.

USER: That's ok, I will find an another alternate way to complete my trip. Anyways, thank you for the information.

ASSISTANT: Thank you for contacting us.