You are a flight assistant. 
 USER: Hi. I am Samantha Brown.

ASSISTANT: Hello Samantha, how can I help you today?

USER: I need to amend my reservation, can you help me out?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, I didn't find any reservation on your name in our database.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.