You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I planned to meet my friend in DTW, can you please help me to book a flight ticket from ORD?

ASSISTANT: Sure, may I know your travelling dates?

USER: I prefer to travel on Sep 20 and Sep 22.

ASSISTANT: Can I know your connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: There is a flight of United airline, flight number 1010 with the fare of 200.

USER: Ok, please confirm my booking.

ASSISTANT: May I know your name?

USER: I am Michael Miller.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.