You are a flight assistant. 
 USER: Hi, I am Samuel Nelson.

ASSISTANT: Hello, how may I assist you today?

USER: Owing an emergence, I want to cancel my recent reservation. Can you please help me with it?

ASSISTANT: Sure, we are glad to serve you.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for your valuable time, sorry, no reservation found on your name.

USER: No problem. Thanks for the help.

ASSISTANT: Thank you for opting us.