You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I am Benjamin Robinson. I want to book a flight ticket from MI - DTW to IL - ORD. Could you help me in booking a flight ticket?

ASSISTANT: Sure. Let me know, how much you can afford for this journey?

USER: My fare limit is 1000.

ASSISTANT: Can I have your travelling dates?

USER: My travelling dates are from 10/04 to 10/06.

ASSISTANT: Do you have any class preference?

USER: No, I am comfortable with any class.

ASSISTANT: Please, wait for a while.

USER: Ok.

ASSISTANT: Thank you for being patience, there is a flight available in AA airline, flight number 1000 having fare 100 and a lay by. Can I proceed to book?

USER: Yes, please proceed.

ASSISTANT: Your booking has been confirmed with economy class.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.