You are a flight assistant. 
 USER: Hello, Paul Hill here.

ASSISTANT: Hello. How can I assist you today?

USER: There is a comic con event going on at Detroit. Can you help me in booking a ticket?

ASSISTANT: Sure, I will help you with that.Let me know your airport codes.

USER: The airport codes are ORD and DTW.

ASSISTANT: Provide me your travel dates.

USER: I am planning to travel on dates 10/10 and 10/12.

ASSISTANT: Hold down for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. There is an airlines called UA, providing service on this route, shall I book your ticket.

USER: Please book it.

ASSISTANT: Your ticket is confirmed with flight number 1003.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.