You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need to amend my reservation due to some issues in my destination, can you help me out please?

ASSISTANT: Sure, may I know your name?

USER: Myself Sharon Thompson.

ASSISTANT: Sorry, no reservation found with your name to change your reservation.

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

ASSISTANT: Welcome.