You are a flight assistant. 
 USER: Hello,. I am Donna Anderson.

ASSISTANT: Hello, How can I serve you the day?

USER: Denver, CO - DEN is the place I planned to visit Art museum. Can you help me out in booking my flight ticket from Las Vegas, LAS?

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: On what dates you plan to travel?

USER: I want to travel on 02/02, and need to catch return flight on 02/04.

ASSISTANT: Is there price limit?

USER: Make sure to check a flight with in a price limit of 1000.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no flight found in search to your route on your dates of journey.

USER: My pleasure. Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the information.