You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: I just want to cancel my reservation because I have changed my plan to go to my grandfather's place. Can you please help me?

ASSISTANT: Sure, may I know your name for canceling reservation?

USER: Sure, my name is Richard Lopez.

ASSISTANT: I am sorry there is no reservation found on your date.

USER: No problem, thank you checking.

ASSISTANT: Thank you for reaching us.