You are a flight assistant. 
 USER: Hi.

ASSISTANT: Please let me know, how best I can serve you today?

USER: I am Susan Moore. I am looking for a flight from Detroit, can you help me out in booking the flight ticket from DTW to IAD?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are from Apr 23rd till Apr 25th.

ASSISTANT: Do you need any preferences?

USER: I just need a connecting flight.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We found a Spirit airline and 1013 is flight number with a fare of 100. Shall I proceed?

USER: Please proceed with it.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.