You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am William Carter.

ASSISTANT: How can I help you?

USER: I need to book a flight ticket from SFO with direct flight, Can you please help me for booking?

ASSISTANT: Sure, may I know your travel dates dates?

USER: I would like to travel on 02/21 to 02/23.

ASSISTANT: Your destination airport code please?

USER: My detsination point is MSP.

ASSISTANT: I am sorry no flights found on your route.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your information.