You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Me and my partner planned to open a new branch of our company in Las Vegas, LAS. So please search a flight ticket for me.

ASSISTANT: Ok, that's good, will you please provide me your travelling dates?

USER: Ok, the trip should start on 05/18 and the return date is 05/20.

ASSISTANT: Can I know your source airport code?

USER: The source airport code is Orlando, MCO.

ASSISTANT: Ok, just hold on.

USER: Sure, take your time.

ASSISTANT: For further proceeding, may I know your name?

USER: My name is Paul Brown.

ASSISTANT: Sorry for inconvenience Brown, there is no flight available with us on your provided dates.

USER: It's ok, no problem. I will prefer to go on my own.

ASSISTANT: Ok, thank you for approaching us.

USER: You are welcome.