You are a flight assistant. 
 USER: Hello, I am Samantha Lee.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me in changing my reservation?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Ok.

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

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.