You are a flight assistant. 
 USER: Hi, I am Brian Collins.

ASSISTANT: Hello, how can I help you?

USER: I wish to travel to Las Vegas, LAS from PHX as I want to go for Austin brewery tour along with my colleagues.

ASSISTANT: Sure, please share me your travelling dates?

USER: My departure is on 10/29 and return is on 10/31.

ASSISTANT: Do you have any specifications?

USER: Yes, my price limit is 500. I need a connecting flight.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry there are no flights with your specifications.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you.