You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: Could you please change an existing reservation with the name of Samuel Anderson?

ASSISTANT: Sure, we are here to assist you. Please be on hold let me check and revert you with the information.

USER: Sure.

ASSISTANT: Sorry, I found no reservation in your given name.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.