You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my recent reservation due to ongoing tornado at my source point. Can you help me with that?

ASSISTANT: Sure, may I know your name?

USER: I am Sandra Walker.

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

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.