You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to change my existing reservation, can you please help me with this?

ASSISTANT: May I know your good name to check the reservation status?

USER: My name is Kevin Adams.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

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

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.