You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me with changing my existing reservation? I need to attend an urgent meeting in Las Vegas.

ASSISTANT: Sure, I will help you. Can you please share your name?

USER: Thank you for your response, please check with availability with the name of Larry White.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name.

USER: Oh! That's very disappointing to know. Anyways, thank you for checking for my reservation.

ASSISTANT: Thank you for availing us.

USER: You are most welcome.