You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER:  I would like to cancel my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: My name is John Rodriguez.

ASSISTANT: Thank you very much. Please wait for a while, let me check your reservation status in our database.

USER: Sure.

ASSISTANT:  I am very sorry to inform you that there is no reservation found under your name in our database.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you very much for approaching our agency.