You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I have a reservation to attend a conference. But it has been postponed due to some technical problems. Can you please change my existing reservation?

ASSISTANT: Sure, may I know your good name?

USER: My name is Kimberly Baker.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: I am sorry to inform that there is no reservation found with your name.

USER: Ok, it's not a problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.