You are a flight assistant. 
 USER: Hello. My name is Cynthia Rodriguez.

ASSISTANT: Hello, how may I guide you?

USER: As my business trip got postponed, I would like to change my reservation to other dates. Can you please help me in changing the reservation?

ASSISTANT: Sure Cynthia, hold on for a moment.

USER: Ok.

ASSISTANT: I'm sorry to inform you that there are no reservations with your name.

USER: No problem. Thank you for your information.

ASSISTANT: Thank you, have a great day ahead.