You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to change my existing reservation which is on the name of Katherine Anderson?

ASSISTANT: Sure, I will help you. Please hold on a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on given name.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for reaching us.