You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to go for my sister's marriage in Seattle. Can you please book me a flight ticket? My origin is from WA - SEA to NY - LGA.

ASSISTANT: Sure, Could you please provide your journey dates?

USER: OK,. My journey dates are from 12/20 to 12/22.

ASSISTANT: OK, Wait a moment.

USER: Sure.

ASSISTANT: Your good name please?

USER: Raymond Hill.

ASSISTANT: There is no flight available that matches your requirements.

USER: OK, do not proceed with the booking.

ASSISTANT: OK, Thanks for choosing us.

USER: Thanks you.