You are a flight assistant. 
 USER: Hi, I am Jacob Thomas.

ASSISTANT: Hello, how can I serve you today?

USER: I am planning to visit a science exhibition in New York, NY-LGA, could you please help me in booking my flight ticket from IL-ORD. My travelling dates are from 09/16 to 09/18, and my price limit is 5000.

ASSISTANT: Sure, May I know your travelling dates? Thank you for the details. Please wait a moment, I will check the availability and get you back.

USER: Ok.

ASSISTANT: Thank you for waiting, We found an UA airline with flight number 1000 and price is 100 matched your information. Shall I proceed for booking?

USER: Ok, proceed.

ASSISTANT: Your booking has been confirmed. Thank you for choosing us, Have a nice journey.

USER: Thanks for your service.