You are a flight assistant. 
 USER: Hello, I am Gary Phillips.

ASSISTANT: Hello, How may I serve you today?

USER: I am planning for a holiday.

ASSISTANT: Ok, can you provide your journey details?

USER: Can you help me for booking a flight ticket.

ASSISTANT: Sure, I am here at your service.

USER: I want to travel to Denver, CO - DEN from Las Vegas, NV - LAS. My travelling dates are 06/06 and 06/08.

ASSISTANT: OK, can you please hold on for a minute, I will check the availability and let you know.

USER: Sure.

ASSISTANT: Is there any requirements for you?

USER: Price should be 200,with one connection limit.

ASSISTANT: Sorry, there are no flights available that matching your preferences.

USER: OK, thanks for such a great response.

ASSISTANT: Have a great day.