You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I would like to cancel my recent reservation as my trip got postpone due to bad weather conditions. Can you help me in cancellation?

ASSISTANT: Sure, may I know your name?

USER: I made a reservation earlier by the name Justin Lee.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for opting us.