You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Due to some emergency, I want to cancel my recent reservation on the name of Samuel Roberts. Will you help me in that?

ASSISTANT: Sure, may I know your name for checking? Sorry, there is no reservation found under your name.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thank you for opting us.