You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am looking for a flight from DEN to ORD, can you help me out?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My trip dates are from Apr 28th till Apr 30th.

ASSISTANT: Do you have any preferences about flight connections?

USER: I am comfortable with one stop over flight.

ASSISTANT: Do you have any preferences about class?

USER: I am looking for an economy class flight.

ASSISTANT: Please mention your name.

USER: Myself Robert Thomas.

ASSISTANT: The United airlines providing an economy class flight with price 100 and the connections 1. Shall I confirm your ticket?

USER: Please proceed with it.

ASSISTANT: Your ticket is booked. The flight number is 1027.

USER: Thank you.

ASSISTANT: Welcome, have a great day.