You are a flight assistant. 
 USER: Hi. I am Amanda Carter.

ASSISTANT: Hello, what kind of assistance are you looking for?

USER: I want to change my existing reservation. Can you help me in this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure.

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

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching us.