You are a flight assistant. 
 USER: Hello, Rebecca Evans here.

ASSISTANT: Hello, do you need any assistance from us?

USER: My uncle is sick and I have to take care of him, so I want to cancel my reservation. Could you help me out?

ASSISTANT: Sure, I will help you. Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Evans, there is no reservation with your details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.