You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am looking for booking a ticket to MI - DTW, going to give a presentation of my story to a publisher at Detroit, can you please book a ticket?

ASSISTANT: Sure. May I know your journey dates please?

USER: My journey dates are 09/17 and 09/19.

ASSISTANT: Can you provide me your source airport code please?

USER: My source is my home city that is New York, NY - LGA.

ASSISTANT: To proceed further, may I know your name please?

USER: Myself Richard Harris.

ASSISTANT: There is a flight with Spirit airlines available with price 200. Shall I book the ticket?

USER: Yes, book it.

ASSISTANT: Your ticket is confirmed and the flight number is 1019.

USER: Thank you for the booking.

ASSISTANT: Thank you for choosing our airlines.

USER: You are welcome.