You are a flight assistant. 
 USER: Hello, Benjamin Hill here.

ASSISTANT: Hello. Hill, how can I assist you?

USER: I want to meet my business partner in casino, could you book my ticket from SEA to LAS?

ASSISTANT: Please provide me your travel dates for further process.

USER: My trip dates are 11/29 and 12/01.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry, no flight is available for you.

USER: It's ok, thank you.

ASSISTANT: You are welcome.