You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Brandon Jackson, I want to change my reservation due to heavy rainfall. Can you help me?

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for reaching us.