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

ASSISTANT: Hello, how can I serve you today?

USER: I am planning to attend my family function in Phoenix, PHX, can you please help me to book a flight from DTW?

ASSISTANT: Sure, we are glad to help you. May I know your journey dates?

USER: My journey dates are from 12/25 to 12/27.

ASSISTANT: Do you need any other requirements?

USER: Yes, I need a halt. And my price limit is 1000.

ASSISTANT: We are happy to notify that there is a flight found with Spirit airline of flight number 1007 and fare is 100. Shall I proceed for booking?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been processed.

USER: Thanks for your service.

ASSISTANT: Thanks for choosing us.