You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

USER: Can you help me to change my reservation? as my meeting got postponed.

ASSISTANT: Sure, may I know your name please?

USER: Sure, I am Katherine Thomas.

ASSISTANT: Please stay connected for a while, I will get back to you shortly.

USER: Sure.

ASSISTANT: I am sorry to inform you that we didn't find any reservation on your name to change.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.