You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Could you please book a flight ticket from ATL to SEA?

ASSISTANT: Sure, can you share your travel dates please?

USER: My travel dates are Mar 21 and Mar 23.

ASSISTANT: May I know your good name please?

USER: My name is Elizabeth Green.

ASSISTANT: Is there any connection limit for you?

USER: No, I need a direct flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Sorry, there is no flight service available on your required routes.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for reaching us.