You are a flight assistant. 
 USER: Hi, I am Lisa Martinez.

ASSISTANT: Hello, how can I render you?

USER: Due to tornado, I want to cancel my holiday trip. Can you please cancel my reservation?

ASSISTANT: Sure, please wait a minute. I will check and get back to you.

USER: Ok.

ASSISTANT: Thank you for your time. Unfortunately, there is no reservation found by your name.

USER: Ok, no problem. Thanks for your response.

ASSISTANT: Thank you for availing us.