You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

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

ASSISTANT: Sure, may I know your good name?

USER: My name is Raymond King.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

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

ASSISTANT: Thank you for opting us.