You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you help me?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to make changes further. May I know your name please?

USER: No problem, Thanks for the information. Are you checked with which name?

ASSISTANT: Can you please confirm your name, I checked with existing name which are there with us.

USER: Richard Hill here.

ASSISTANT: Sorry Hill, there is no reservation matching with your name in our portal.

USER: My name is Richard Hill not Hill.

ASSISTANT: Thank you for reaching us.