You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Margaret Campbell here.

ASSISTANT: Margaret, how can I help you today?

USER: I want to cancel my ticket due to heavy floods in my hometown.

ASSISTANT: Sure, I am at your service to help you. Please hold on for a moment.

USER: Sure.

ASSISTANT: Sorry Margaret, I did not find any reservation under your name in our database.

USER: No problem, thank you for checking.

ASSISTANT: It's my pleasure, have a great day.