You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you at this moment?

USER: I am Ruth Thomas, I want to change my reservation due to heavy rainfall at my place. Can you please help me?

ASSISTANT: Sure Ruth Thomas, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to  check your reservation status.

USER: Sure.

ASSISTANT: Sorry Ruth Thomas, no reservation has found under your name to change.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for choosing us, have a good day.