You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Can you book a flight ticket to Seattle on my name?

ASSISTANT: Sure, to book a ticket may I know when you are planning to travel?

USER: The trip dates are from Dec 26 to Dec 28.

ASSISTANT: Can you please share me your airport codes?

USER: My airport codes are from DFW to SEA.

ASSISTANT: Do you need any connecting flight or direct flight?

USER: I need a single connecting flight.

ASSISTANT: Is there any class preference for you?

USER: I would like to prefer a economy class.

ASSISTANT: May I know your name please?

USER: I am Samantha Smith.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is a flight available with an United airline of flight 1015 in an economy class with lay by. Would you like me to proceed?

USER: I am ok with the airlines and fare. You can book the flight ticket.

ASSISTANT: Your ticket has been reserved on name of Samantha Smith.

USER: Thank you.

ASSISTANT: Thank you for choosing us.