You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to change my existing reservation due to heavy rainfall, can you please help me with that?

ASSISTANT: May I know your name to check your reservation from our database?

USER: My name is Virginia White.

ASSISTANT: We regret to inform you that there is no active reservation found on your name to change.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.