You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Can you help me cancel my reservation which was made on the name of Dennis Brown?

ASSISTANT: Sure, we are here to help you to cancel your reservation. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, there was no reservation found on your name.

USER: It's ok, thank you for your response.

ASSISTANT: Thank you for availing us.