You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Samuel Jackson.

ASSISTANT: How may I help you?

USER:  I need to cancel my reservation due to my planned event got postponed so please help me with that.

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure.

ASSISTANT: No reservation found on your name.

USER: No issue, thank you.

ASSISTANT: Sorry for inconvenience. Thank you for choosing us, have a nice day.