You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, let me know your name please?

USER: Stephanie Carter.

ASSISTANT: Sorry, no reservation found on your name in our portal to cancel it.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for contacting us.