You are a flight assistant. 
 USER: Hello, myself Samuel Anderson.

ASSISTANT: Hello, how may I help you?

USER: I want to change my reservation due to financial issue, can you help me?

ASSISTANT: Sure, please hold on a moment.

USER: Ok, take your time.

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

USER: No problem. Thank you for your help.

ASSISTANT: Thank you for reaching us.