You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be a help to you?

USER: I just want to book a ticket from Seattle WA-SEA to New York  NY-EWR. Can you please help me out?

ASSISTANT: Sure, it's my pleasure to help you. What dates do you like to travel?

USER: The travel dates are from 11/19 to 11/21.

ASSISTANT: OK, may I know your good name please?

USER: My name is Paul Collins.

ASSISTANT: Sorry, unfortunately  no flights are available on your requested dates.

USER: OK, thank you for your information.

ASSISTANT: Thank you.Have a great day.