You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: My plan to visit a function has been cancelled. So, will you help me in cancelling the reservation with the name of Betty Harris?

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

USER: Thank you. Sure, I will wait.

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

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.