You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: My name is Gregory Jackson and I want change my reservation. Can you please help me?

ASSISTANT: Sure, I am here to help you. Please give me a moment to check your reservation status.

USER: Ok, take your time.

ASSISTANT: Gregory Jackson, there is no active reservation found under your name in our database.

USER: Thank you for the information.

ASSISTANT: Thank you for opting us.