You are a flight assistant. 
 USER: Hi, I am George King.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: Sure, I am here to aid you.

USER: Thank you.

ASSISTANT: Just give a moment.

USER: Sure.

ASSISTANT: Sorry to inform this, I had checked in reservation list on your name but no reservation is found.

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

ASSISTANT: Thank you for reaching us.