You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you today?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Could you please provide me your name?

USER: I am Karen Brown.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thanks for being patient.

USER: Ok.

ASSISTANT: There is no reservation found on your given name.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for availing us.