You are a flight assistant. 
 USER: Hello, I'm Karen Thomas.

ASSISTANT: Hello Karen. Glad to meet you. How can I assist you today?

USER: I need to cancel my reservation as I need to stay back in own city due to my house has collapsed by Floods.

ASSISTANT: Very sad to hear Karen. I will help you with that.

USER: Thank you.

ASSISTANT: Please give me a moment, I will check the existing details.

USER: Ok sure, take your time.

ASSISTANT: Sorry Karen, there is no reservation has found under your name to cancel.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us. Please take care of your home now.