You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Lisa White.

ASSISTANT: How can I oblige you today?

USER:  I would like to cancel my recent reservation, my baseball tournament has been rescheduled to future dates. Can you please help me.?

ASSISTANT: Sure, I am here to help you. Please stand by.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.