You are a flight assistant. 
 USER: Hello, Timothy Lopez here.

ASSISTANT: Hello, Lopez how can I address you?

USER: I want to cancel my recent reservation because my brother meet an accident.

ASSISTANT: So sad to hear.Give me a moment to check the existing reservation.

USER: Sure, take your own time.

ASSISTANT: Sorry Lopez, there is no reservation found with your details. Do you have any other requirements?

USER: That's alright, no problem.

ASSISTANT: Ok.

USER: Thank you so much.

ASSISTANT: You are welcome. Hope your brother recover soon.

USER: Most welcome.