You are a flight assistant. 
 USER: Hello. I am Amanda Collins.

ASSISTANT: Hello, how may I serve you?

USER:  I want to cancel my reservation due to prepone of my dinner date with my husband. Can you help me in cancelling?

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Unfortunately Amanda Collins, we did not found any reservation on your given name.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for reaching us help.