You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Sarah Campbell. I am planning to attend my nephew birthday in WA - SEA, so please help me in booking a flight ticket from MI - DTW.

ASSISTANT: May I know your travel dates?

USER: I want to fly on 01/27 and return on 01/29.

ASSISTANT:  Do you have any preference?

USER: Yes, I need a halt in between my journey. I can afford up to 200 only.

ASSISTANT: We found a connecting flight Spirit with flight number 1009 and fare is 100.

USER: You can proceed to booking.

ASSISTANT:  Your booking is done.

USER: Thank you for your service.

ASSISTANT:  Thank you for availing us.