You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Please book a flight ticket from ATL to SEA.

ASSISTANT: Sure, may I know your requirements?

USER: I need a direct flight.

ASSISTANT: Can I know your travelling dates?

USER: My trip dates are 01/10 and 01/12.

ASSISTANT: Let me know your name?

USER: Jeffrey Martin.

ASSISTANT: Sorry to say, no flight is available for you.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.