You are a flight assistant. 
 USER: Hello,. I am John Williams.

ASSISTANT: Hello, how can I help you today?

USER: I would like to book a flight ticket to Philadelphia to attend my business meeting with my partners. Could you help me in booking from 04/02 to 04/04. I need a connection.

ASSISTANT: Sure, may I know your airport codes please?

USER: I would like to fly out from DTW to PHL.

ASSISTANT: Do you have any price limit?

USER: Sure, my price should not exceed 500.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: We found a flight with Frontier airlines, flight number is 1017 with one connection and price is 100.

USER: Ok, proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Thanks for your quick service.

ASSISTANT: Thanks for choosing us.