You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your good name?

USER: I am Richard Johnson.

ASSISTANT: How can I help you?

USER: I would like to book  a flight ticket to visit Detroit ,MI-DTW on 11/10.

ASSISTANT: Ok, sure please provide me your return date and starting point.

USER: My boarding is from Houston, TX-IAH and my return will be 11/12.

ASSISTANT: Sure, we found a flight matching your requirements with flight number 1000 and airline UA. Can I proceed with booking?

USER:  Sure, You can proceed with this airline.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing our service.