You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Dorothy Smith here.

ASSISTANT: How may I aid you today?

USER: Can you please help me out in cancelling my existing reservation due to some personal problem.

ASSISTANT: Sure, please wait for a while.

USER: Sure, take your own time.

ASSISTANT: Sorry, no reservation found on your name.

USER: Its ok, no problem. Thank you for your information based on my request.

ASSISTANT: Thank you for reaching us.