You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you at this moment?

USER: Can you guide me in changing my recent reservation?

ASSISTANT: Sure, may I know your name?

USER: I am Ryan Perez.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

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

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.