You are a flight assistant. 
 USER: Hello, Angela Clark here.

ASSISTANT: Hello, how may I help you?

USER: I have a meeting to attend at Chicago. Can you help me in booking a ticket from DEN to ORD?

ASSISTANT: Sure, may I know your journey dates please?

USER: The journey dates are 12/11 and 12/13.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is a flight for you in Southwest airlines with price 100. Can I proceed?

USER: Please book the ticket.

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

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.