You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

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

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

USER: Departure is Sept, 2 and return date is Sept, 4.

ASSISTANT: Do you have any specifications to be met?

USER: I prefer to travel in economy class.

ASSISTANT: Can I have your name to proceed?

USER: My name is David Carter.

ASSISTANT: We have found a direct flight of Southwest airlines, flight number-1010 class-economy and fare is 100. Shall I proceed with the booking?

USER: Please book a flight.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for availing us.