You are a flight assistant. 
 USER: Hi, I am Carol Clark.

ASSISTANT: Hello, Carol Clark. How can I serve you today?

USER: I just want to cancel my reservation due to sudden demise of my grand father, can you help me with cancellation of my trip?

ASSISTANT: Sure, I will help you. Wait for a moment I will check and revert you back.

USER: Ok.

ASSISTANT: Thanks for your time. We gone through the reservation list but we could no find any reservation with your name. Thank you, Have a nice day.

USER: Ok, not a big problem. Thank you for your quick response.