You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Elizabeth Parker want to visit Chicago, can you book a ticket with price under 200?

ASSISTANT: Sure, I will help you with that. Could you please provide your preferable dates of travelling?

USER: Sure, my travelling dates will be 03/25 and 03/27.

ASSISTANT: Ok, may I know your source and destination airport codes for booking?

USER: Yes, I want to fly from PHL to ORD.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok.

ASSISTANT: According to your information, I have found a flight with 1 connection with the fare of 100. Is it ok for you?

USER: Ok, proceed with my booking.

ASSISTANT: Ok, your ticket has been booked successfully with flight number 1002.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a safe journey.