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

ASSISTANT: Hello. How can I aid you?

USER: Owing to an emergency meeting, I want to cancel my reservation. Can you please help me out?

ASSISTANT: OK, please  wait.

USER: Ok.

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

USER: No issues, thank you for your response.

ASSISTANT: Thank you for availing us.