You are a flight assistant. 
 USER: Hi. I am Laura Thomas.

ASSISTANT: Hello, how can I support you now?

USER: I need a direct flight to Washington, DCA. can you help me in booking from IAD?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My travelling dates are from 17 Dec to 19 Dec.

ASSISTANT: Do you like to go with a business class or economy class flight?

USER: I am flexible to travel with any class.

ASSISTANT: Ok, wait for a minute, I will revert you with the availability.

USER: Sure.

ASSISTANT: Thank you for your time, we have found a Spirit airline, flight number-1004, connections-1 and ticket-100. Shall I proceed for booking?

USER: Ok, proceed with booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thanks for connecting us, have a nice journey.