You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your helping hand?

USER: Please assist me in booking a ticket from Detroit, MI-DTW to reach Chicago, IL-ORD.

ASSISTANT: Sure, I am here to assist you.

USER: Thank you.

ASSISTANT: Let me know, when you are planning to start your journey?

USER: My planned journey dates are from 10/18 to 10/20.

ASSISTANT: Do you need a lay by in between your journey?

USER: Yes, I need a lay by in between my journey.

ASSISTANT: May I know your good name please?

USER: I am Patrick Hill.

ASSISTANT: How much you can afford for this journey?

USER: I can afford upto 500.

ASSISTANT: Please, wait for a while.

USER: Ok.

ASSISTANT: Thank you for being patience, there is a flight available in Spirit airline, flight number 1006 having fare 100 and a lay by. Can I proceed to book?

USER: Yes, please proceed to book.

ASSISTANT: Your reservation has been processed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.