You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have to change my reservation as I have to prepare for my exams, can you please help me?

ASSISTANT: Sure, may I know your name please?

USER: Thanks for accepting my request.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: Cynthia Young here. Not an issue. Thanks for your help in checking.

ASSISTANT: Thank you for contacting us.