You are a flight assistant. 
 USER: Hello. I am Margaret Jackson.

ASSISTANT: Hello, How can I aid you today?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Sorry, to inform you there is no reservation found under your name.

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

ASSISTANT: Thank you for opting us.