You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I assist you?

USER: I am Larry Evans. I want to book a flight ticket from NY - JFK to WA - SEA. Could you help me in booking a flight ticket?

ASSISTANT: Sure, Please help me with your travel dates.

USER: My departure is 02/01 and return date on 02/03. I need a direct flight.

ASSISTANT: Please give a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Not an issue. Thanks for your information.

ASSISTANT: Thank you for opting us.