You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Please help me to change my recent reservation.

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: Can you share your good name with us?

USER: Karen White.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: There is no reservation found on your name in our database to change it.

USER: Thank you for your information.

ASSISTANT: Thank you for availing us.