You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: My name is Michael Phillips. I want to book a flight ticket from Las Vegas, NV - LAS to Los Angeles, CA - LAX to meet my first cousin.

ASSISTANT: Sure, do you have any limitations on price?

USER: My price limit is 500.

ASSISTANT: Please help me with your travelling dates?

USER: My departure day is 05/27, return day is 05/29.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry for the inconvenience, there is no flight found with your needs.

USER: No problem, thank you.

ASSISTANT: Thanks for your approach.