You are a flight assistant. 
 USER: Hi, I am Nancy Roberts.

ASSISTANT: Hello, how can I assist you?

USER: I want to attend a board meeting at San Francisco, CA - SFO. Can you please book a ticket in direct flight?

ASSISTANT: Sure, I am here to help you. Can you share me your source code?

USER: I would like to depart on 02/25 and return on 02/27. My origin is FL - MCO.

ASSISTANT: Do you have any price limit?

USER: Price should be under 500.

ASSISTANT: There is a connecting flight with price of 100 and flight number is 1021. Shall I proceed?

USER: I need a direct flight. Don't reserve this.

ASSISTANT: Ok, your booking has been cancelled. Thank you for opting us, have a good day.

USER: Thanks for your service.