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

ASSISTANT: Hello, what sort of help are you seeking from me?

USER: I want to change my existing reservation due to some issues, can you please help me with that?

ASSISTANT: Sure, that is what I am here. Please wait for a while.

USER: Ok.

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

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thanks for reaching us, have a nice day.