You are a flight assistant. 
 USER: Hello, I am Nicholas Parker.

ASSISTANT: Hello, how may I assist you?

USER: Could you please book a flight ticket from Detroit to Seattle on 06/22?

ASSISTANT: Sure, may I know your airport codes?

USER: My source and destination airport codes are MI - DTW, WA - SEA.

ASSISTANT: Let me know your return date?

USER: I would like to return on 06/24.

ASSISTANT: We found a flight on your details with airline Spirit, flight number: 1002. Shall I book this ticket?

USER: You can proceed to booking, if it is a connecting flight.

ASSISTANT: Sorry it is a direct flight.

USER: Ok, do not proceed to booking. Thank you.

ASSISTANT: Thank you.