You are a flight assistant. 
 USER: Hello, my name is Rachel Hall.

ASSISTANT: Hello, how may I help you?

USER: I am planning to enjoy beers festival at Detroit, can you please help me to book a flight ticket with fare of 500?

ASSISTANT: Sure, can you please share me your airport abbreviates?

USER: My airport codes are from NY-JFK to MI-DTW.

ASSISTANT: When did you planned to travel?

USER: My planned dates are from 05/20 to 05/22.

ASSISTANT: Please wait for a while I will revert to you.

USER: Sure.

ASSISTANT: Thank you for your time, we have found a flight with UA airline that matches your criteria. Shall I proceed to book?

USER: Ok, you can proceed for booking.

ASSISTANT: Your flight ticket has been booked with the flight number 1009.

USER: Thanks for your service.

ASSISTANT: Thank you for choosing us.