You are a flight assistant. 
 USER: Hello. Ronald Hall here.

ASSISTANT: Hello. How may I help you? Happy to meet you Ronald.

USER: I would like to meet my relatives who are lived in Detroit.Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are from DEN to DTW.

ASSISTANT: Can you share your dates too.

USER: My departure date is 07/21 and return date is 07/23.

ASSISTANT: Ok, there is a flight for you according your information with flight number 1007. Shall I proceed?

USER: Please proceed for booking.

ASSISTANT: Ok, your ticket has been done on UA airline.

USER: Thank you for helping me.

ASSISTANT: Welcome, have a safe journey.