You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: Frank Martinez here. Due to sudden changes, my seminar has been postponed. Can you please change my reservation?

ASSISTANT: Sure, I am hereto help you. Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.