You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Dennis Jackson here, due to an emergency I want to cancel my reservation. Can you please help me with it?

ASSISTANT: Sure, I am here to help you. Please wait a minute.

USER: Ok.

ASSISTANT: Thanks for your time, sorry to say no reservation found with your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing us, have a nice day.