You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello, how may I best serve you for the day?

USER: Owing an emergence, I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, can I know your good name to check the reservation on your name?

USER: My name is Scott King.

ASSISTANT: Thank you for providing your name, please stand by.

USER: OK.

ASSISTANT: Thank you for your valuable time, I hardly tried to find a reservation on your name, but there is no reservation found on your name.

USER: OK, no issues. Thanks for the help.

ASSISTANT: Thank you.