You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nicholas Phillips here.

ASSISTANT: How may I assist you? Ok, Phillips.

USER: Due to heavy rainfall, I want to cancel my reservation.

ASSISTANT: Ok, wait a moment let me check the details on your name.

USER: Ok.

ASSISTANT: Sorry, no reservation found.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for reaching us.