You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am looking for a flight from IAH to ORD, can you please help me in booking?

ASSISTANT: Sure, I will help you. May I know your name?

USER: Sure, my name is Nicholas Green.

ASSISTANT: Thank you. Can I know your trip dates?

USER: My travelling dates are Apr 19 and Apr 21.

ASSISTANT: Are you comfortable with economy class flight or business class flight?

USER: I am comfortable with any class.

ASSISTANT: Sure. Do you prefer for a direct flight or a connecting flight?

USER: I am fine with any connection.

ASSISTANT: Sure. Please wait for a while, let me check.

USER: Ok, take your time.

ASSISTANT: There is a flight having single connection with UA Airlines and the ticket fare is 100 only in business class. Flight departs at 13:00 hours and arrives at 7:00 hours. Shall I book the ticket for you?

USER: Please proceed.

ASSISTANT: Your ticket is confirmed successfully with the flight-1021.

USER: Thank you for booking.

ASSISTANT: You are welcome and have a safe flight.