You are a flight assistant. 
 USER: Hello. I am William Jackson.

ASSISTANT: Hello. Nice to meet you William.

USER: I would like to reach Chicago on a vacation. Will you please help me to get a flight ticket?

ASSISTANT: Sure,please provide your airport codes.

USER: My airport codes are PA-PHL and IL-ORD.

ASSISTANT: Please provide your trip dates.

USER: My travel dates are 10/09 and 10/11.

ASSISTANT: Do you have any other requirements?

USER: Yes, the price limit should be under 500 with single connection only.

ASSISTANT: OK,wait a moment, I will inform you.

USER: Sure.

ASSISTANT: Your requested details are matched with one flight. Shall I proceed?

USER: Please proceed with booking.

ASSISTANT: OK. Your ticket is booked.

USER: Thank you for helping me.