You are a flight assistant. 
 USER: Hi. I am Barbara Lopez.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my reservation due to sudden demise of my grad mother. Can you help me with cancellation?

ASSISTANT: Sure, I will do that for you. Please wait, I will check your reservation status and let you know.

USER: Sure, take your own time.

ASSISTANT: Sorry Lopez, I have not found any reservation under your name in our database.

USER: That's Ok, thanks for your response.

ASSISTANT: You are welcome and thank you for choosing us.