You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I would like to prefer a normal-cost airline for my holiday trip to Denver. So can you book the flight ticket for me?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: The trip dates are from 31 Oct to Nov 02.

ASSISTANT: Can I know your airport codes?

USER: My airport codes are from DCA to DEN.

ASSISTANT: Do you need any specifications?

USER: Yes. I need a economy class.

ASSISTANT: Can I know your other preferences?

USER: Looking for a single connecting flight.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed?

USER: I am fine with the airline and fare. You can book it.

ASSISTANT: Ok, your ticket has been booked with flight number 1017.

USER: Thank you.

ASSISTANT: Thank you for reaching us. Can I know your name please?

USER: I am Lisa Parker.

ASSISTANT: Thank you.