You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you?

USER: I am Susan King. I want to book a flight ticket within 500. Can you help me?

ASSISTANT: Sure, we are rapturous to help you. Kindly mention your source and destination points.

USER: ORD and MSP are my airport codes.

ASSISTANT: Ok, please provide your depart date and return date.

USER: 04/26 and 04/28 are my travelling dates.

ASSISTANT: Ok, Is there any class preference?

USER: No, I am comfortable with any class .

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for your patience, we found a direct flight in UA airline with a fare of 200. Can I proceed for booking?

USER: You can reserve it.

ASSISTANT: Sure, your ticket has been booked with flight number 1004 of economy class.

USER: Thank you for your help in booking the flight ticket.

ASSISTANT: Thank you for reaching us.