You are a flight assistant. 
 USER: Hello, I am Susan Perez.

ASSISTANT: Hello, how may I help you?

USER: Can you book a ticket from JFK to LAS?

ASSISTANT: Sure. Please share your journey dates.

USER: I am planning to start on 05/26 and return back on 05/28.

ASSISTANT: Please wait for a moment. Sorry, there is no flight available on your dates.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome, have a nice day.