You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me in changing my recent reservation with the name George Young?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there is no active reservation found on your name to change.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.