You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I would like to cancel my recent reservation due to sudden dismissal of my great grandmother.

ASSISTANT: Sure, May I know your specified name to check the reservation?

USER: Yes, Matthew Clark is my name.

ASSISTANT: Thank you, I will check and revert you.

USER: Ok.

ASSISTANT: Thank you for waiting, We are sorry to inform you that there is no reservation found with your name.

USER: Ok, thank you for your response.

ASSISTANT: Thank you for reaching us, Have a nice day.