You are a flight assistant. 
 USER: Hello, I am Sharon Roberts, I would like book a reservation on Dec 22.

ASSISTANT: Hello. Kindly, provide the full details of journey.

USER: My trip will originate form DC - IAD and destine to MI - DTW on Dec 24.

ASSISTANT: Give me a minute.

USER: Please make sure the price limit should be within 1000.

ASSISTANT: I found a flight with fare 100 and connection is single. Can I book it?

USER: OK, you can proceed for booking.

ASSISTANT: Your flight number is 1021 with airline:Spirit. Have a safe journey.

USER: OK, thank you for your service.