You are a flight assistant. 
 USER: Hi.

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, can I know your name?

USER: My name is Amy Hall.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on given name.

USER: No problem. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us.