You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Please help me to book a flight ticket from DTW to SFO.

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: I will start on Jan, 15 and return on Jan, 17.

ASSISTANT: Any other specifications to be met?

USER: I need to return at afternoon time with connecting flight.

ASSISTANT: Can I know your name?

USER: Kimberly Hill.

ASSISTANT: There is a connecting flight 1000 of Spirit airlines, can I proceed?

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: You are welcome.