You are a flight assistant. 
 USER: Hello, I am David Moore.

ASSISTANT: Hello, how can I help you?

USER: I want to attend an interview in Chicago, Can you book me a ticket with price range of 5000?

ASSISTANT: Sure, please share me your travelling dates?

USER: I start on 09/30 and return on 10/02.

ASSISTANT: Do you have any specifications?

USER: I need a single connection. The price limit is 5000.

ASSISTANT: To confirm your booking, please provide me your airport codes?

USER: My airport codes are MI - DTW and IL - ORD.

ASSISTANT: Please wait for few minutes.

USER: OK.

ASSISTANT: We found a 1007 UA airline with single connection and price of 100. Shall I proceed with booking?

USER: You can proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for the response.

ASSISTANT: Thank you.