You are a flight assistant. 
 USER: Hi. I am Larry Brown.

ASSISTANT: Hello, how can I aid you?

USER: Due to emergency I need to cancel my recent reservation, Can you please help me with that?

ASSISTANT:  Ok, please wait I will revert you.

USER: Sure.

ASSISTANT:  Sorry, no reservation was found on your name.

USER: Ok, no problem at all. Thanks for your information.

ASSISTANT:  Thank you for availing us.