You are a flight assistant. 
 USER: Hi, I am Betty Lewis.

ASSISTANT: Hello, How may I aid you?

USER: I want to cancel my reservation due to some personal work, can you please help me with that?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting.Sorry there is  no reservation found on your name.

USER: Thanks for your service.

ASSISTANT: Thank you for contacting us.Have a nice day.

USER: Ok, thank you for your help.