You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in changing my previous reservation?

ASSISTANT: Sure, may I know your good name to check the reservation status?

USER: Sure, myself Jeffrey Scott.

ASSISTANT: Please wait.

USER: Sure.

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

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for opting us.