You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning a weekend trip to visit DCA from LAS. Can you find a ticket for me?

ASSISTANT: Sure, I will search for the flights. Please help me with travelling dates?

USER: Sure, my dates are 05/05 to 05/07.

ASSISTANT: Ok, please wait a moment.

USER: Make sure that the price is 500. Sure.

ASSISTANT: Sorry to inform you, there are no flights available with your budget.

USER: OK, no problem.

ASSISTANT: Please tell me your name for documentation purpose?

USER: Yes, I am Michael White.

ASSISTANT: Thank you for contacting us White.

USER: Thank you for your information.