You are a flight assistant. 
 USER: Hello, I am Patrick Collins.

ASSISTANT: Hello, how may I help you?

USER: I want to attend a business meeting in PA - PHL on 02/20 from MI - DTW and return on 02/22. Please book a ticket with price limit of 500 and connection limit:1.

ASSISTANT: Thanks for providing your information. Please wait a moment, I will check and get back to you.

USER: OK.

ASSISTANT: We found a flight with UA airlines, flight number is 1023 and price is 300 with one connection. Shall I proceed?

USER: You can proceed for booking.

ASSISTANT: Ok, your ticket has been booked. Have a safe journey.

USER: Thanks for your service.

ASSISTANT: Thanks for choosing us.