You are a flight assistant. 
 USER: Hi, I am Gregory Walker.

ASSISTANT: Hello. How can I serve you?

USER: Due to the sudden demise of my uncle, I want to cancel my reservation. Can you help me with that?

ASSISTANT: Sure we are here to help you. Please wait a while I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for being patient. Unfortunately, There is no reservation found by this name.

USER: Ok, no issues. Thanks for your valuable information.