You are a flight assistant. 
 USER: Hello. Ronald Miller here.

ASSISTANT: Hello, how can I aid you?

USER: Due to sudden changes, my seminar has been postponed. Can you please help me to change my reservation?

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: There is no reservation on your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you.