You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you?

USER: Can you please change my reservation?

ASSISTANT: Sure, I am here to help you for this. Let me check your reservation status in our records. May I know your name?

USER: Sure, I am Kathleen Lewis.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We could not find any reservation by the name you provided in our database.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for choosing us.