You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Nancy Lopez, want to travel from ATL to SEA for my project submission. Can you please help me in ticket booking.

ASSISTANT: Sure, may I know your trip dates please?

USER: My trip dates are from 04/05 to 04/07. Please check for only direct flights.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: That's fine, thank you.

ASSISTANT: Most welcome.