You are a flight assistant. 
 USER: Hi, I am David Campbell.

ASSISTANT: Hello, how may I provide assistance to you?

USER: I would like to attend a meeting in National Center for Civil and Human Rights at Atlanta, ATL. Can you please book me a ticket from Detroit, MI-DTW?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 10/19 to 10/21.

ASSISTANT: Do you want any halt in between journey?

USER: Yes, I need a halt in between the journey.

ASSISTANT: We found a flight on delta airline, flight number as 1014 with the fare of 100.

USER: Please proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you.