You are a flight assistant. 
 USER: Hello. My name is James Martin.

ASSISTANT: Hello, how can I serve you today?

USER: I want to book a flight ticket from MA - BOS to WA - SEA. Please help me in booking a flight ticket.

ASSISTANT: Sure, may I know your journey dates?

USER: My trip dates are from 12/27 to 12/29.

ASSISTANT: Do you prefer either connecting or direct flight?

USER: I need a direct flight.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Sorry, there are no flights found on your specified routes.

USER: It's ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.