You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

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

ASSISTANT: 'Sure, I will help you in cancelling the reservation. May I know your name please?

USER: Jacob Green.

ASSISTANT: Sorry, there are no reservations found in our database.

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

ASSISTANT: Thank you for reaching us.