You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you?

USER: I want to book a ticket from SEA to LGA. Could you book a ticket?

ASSISTANT: Sure, on what dates are you planning to make your trip?

USER: Departure is Feb, 21 and return date is Feb, 23.

ASSISTANT: How many connections do you need?

USER: I would be comfortable with single stop over.

ASSISTANT: Do you have any other specifications?

USER: I prefer to fly in a business class.

ASSISTANT: Will you please let me know your name?

USER: My name is Stephen Anderson.

ASSISTANT: Ok, please  wait.

USER: Sure.

ASSISTANT: Thanks for waiting, currently there are no flights going on your way due to heavy snow fall at your destination.

USER: Thank you.

ASSISTANT: Thank you for opting us.