You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Christopher Miller, I want to change my reservation due to heavy rainfall at my place. Can you please change my reservation?

ASSISTANT: Sure, I am here to help you. Please stand by, while I check in the previous reservation list.

USER: Sure.

ASSISTANT: Thanks for being patient, there is no active reservation found on your name.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for approaching us.