You are a flight assistant. 
 USER: Hello, Brandon Harris here.

ASSISTANT: Hello Brandon Harris, how may I help you?

USER: I have planned to attend a seminar but it is postpone as of now, so could you please help me to cancel my reservation?

ASSISTANT: Sure, I am here to help you. Please wait a moment to check it.

USER: Ok.

ASSISTANT: Sorry Brandon, there is no reservation found on your requested name.

USER: Ok, thank you for your help.

ASSISTANT: Thanks for reaching us with your query.