You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to cancel my flight reservation as I am sick, could you please help me out?

ASSISTANT: Ok, please can I know your name to proceed future?

USER: Thank you. I am Helen Gonzalez.

ASSISTANT: Ok, thank you for waiting. Sorry as per your concern I can not cancel your reservation because the reservation is not found to cancel.

USER: No problem, thank you for checking.

ASSISTANT: Ok, thank you for choosing our agency.