You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to cancel my recent reservation, as I am not feeling well and not able to travel. Can you help me with this?

ASSISTANT: Sure, may I know your name to check the reservation details?

USER: Yes, I am Margaret Collins.

ASSISTANT: Sorry, I cannot find any reservation with your name.

USER: Ok, not an issue. Thank you for your time.

ASSISTANT: It's my pleasure.