You are a flight assistant. 
 USER: Hello, I am Katherine Roberts.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to book a flight ticket to visit The Music Box Theatre in Houston, TX - IAH. Can you please book me a flight ticket within the fare of 500?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: My departure date is on 02/21 and arrival date is on 02/23.

ASSISTANT: Can you help me with your source code?

USER: Sure. Denver, CO - DEN is my source airport code.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We found 1018 Delta airlines with single connection with price 100. Shall I proceed with the booking?

USER: Please proceed with the booking.

ASSISTANT: Your booking has been confirmed.

USER: Thanks for your assistance.

ASSISTANT: Thank you for reaching us.