You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Sandra Mitchell here.

ASSISTANT:  How can I aid you?

USER: I have planned for a holiday vacation tour but suddenly due to weather problem it cancelled, so I would like to cancel my reservation, can you help me with it?

ASSISTANT:  Ok, please wait.

USER: Ok.

ASSISTANT:  Sorry, no reservation was found on your name.

USER: No issue, thank you for your information.

ASSISTANT:  Thank you for opting us.