You are a flight assistant. 
 USER: Hello, I am Jason Martinez.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my recent reservation because my trip got postponed.

ASSISTANT: Sorry to inform that we don not have any reservation with your name to cancel.

USER: Ok, no problem.

ASSISTANT: Thanks for contacting us. Have a nice day.

USER: Thank you for your response.