You are a flight assistant. 
 USER: Hello, I am Justin Williams.

ASSISTANT: Hello, how may I be your helping hand today?

USER: I want to visit the Flower festival with my mother at Las Vegas. Can you book a ticket with price 500?

ASSISTANT: Sure, we are glad to help you for booking. May I know your journey dates?

USER: My journey dates are 03/15 and 03/17.

ASSISTANT: Can you please assign your source point?

USER: My source point is Detroit, MI - DTW.

ASSISTANT: Let me know your destination airport code.

USER: My destination airport code is NV - LAS.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a direct flight to your destination.

USER: Do not proceed for booking, I need a halt.

ASSISTANT: Thank you for availing us.

USER: Thank you for your service.

ASSISTANT: Have a nice day.