You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Lisa Roberts.

ASSISTANT: How may I help you?

USER: Due to heavy rainfall in my city, I would like to cancel my reservation. Can you help me?

ASSISTANT: Sure.

USER: Ok.

ASSISTANT: Actually, there is no reservation found on your name.

USER: It's fine. Thank you for your help.

ASSISTANT: Thank you for reaching us.