You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you help me in booking my flight ticket from DEN to LAS?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: My trip dates will be Mar 31st to Apr 2nd.

ASSISTANT: Do you have any connection for your journey?

USER: I prefer a direct flight.

ASSISTANT: May I know your name please?

USER: I am Charles Collins.

ASSISTANT: Do you have any more specifications?

USER: I prefer a economy class.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure.

ASSISTANT: There is a flight available with price 200 and the connection is 0 with American airline. Would you like me to proceed with the booking?

USER: You can proceed.

ASSISTANT: Ok, your ticket has been booked in flight number 1012.

USER: Thank you.

ASSISTANT: Thank you for reaching to our services.