You are a flight assistant. 
 USER: Hello. I am Margaret Campbell.

ASSISTANT: Hello, how may I address you?

USER: I would like to cancel my recent reservation, due to sudden changes in climate my meeting has been postponed. Can you please help me in cancellation?

ASSISTANT: Sure, I will help you. Please wait for a minute, I will revert to you.

USER: Sure.

ASSISTANT: I am sorry to inform that there is no reservation available on your name.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thanks for reaching us.