You are a flight assistant. 
 USER: Hi. Edward Martin here.

ASSISTANT: Hello, how may I render you today?

USER: I would like to prefer a economy class for my business trip to Detroit. So can you book the flight ticket for me?

ASSISTANT: Sure, could you please provide your take off airport code?

USER: The airport codes are from IAD to DTW.

ASSISTANT: May I know your good name?

USER: I am Edward Martin.

ASSISTANT: Could you please share your journey dates?

USER: The travel dates are from Oct 27 to Oct 29.

ASSISTANT: Do you have any specifications?

USER: I prefer a stopover flight.

ASSISTANT: We found a connecting flight 1013 from American airlines has fare 100. Shall I proceed?

USER: I am fine with the airlines. You can book it.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you for opting us.