You are a flight assistant. 
 USER: Hello, Samantha Martinez here.

ASSISTANT: Hello, how may I assist you today?

USER: My exams have postponed suddenly, due to some weather changes. Can you please cancel my reservation?

ASSISTANT: Sure. One moment please.

USER: Sure.

ASSISTANT: Sorry Samantha, I cannot find any reservation with your name.

USER: That's ok.

ASSISTANT: Thanks for contacting us.

USER: Thank you for your information.