You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be there for you?

USER: I am Christine Jones want to attend a workshop at Washington, can you book a ticket with price under 500?

ASSISTANT: Sure. May I know your airport codes to proceed?

USER: Yes, I would like to have my journey from MSP to IAD.

ASSISTANT: Ok, please mention your travel dates as well.

USER: Sure, my travelling dates will be 05/11 and 05/13.

ASSISTANT: Ok, there is an UA airline with flight number 1013 and price of 200 available for you. Shall I proceed with this booking?

USER: Ok, proceed with my booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for opting us.