You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Elizabeth Williams here.

ASSISTANT: How can I assist you today?

USER: I have to cancel my reservation which I have done earlier to participate in dance programme but unfortunately I have stay back here to take care of my grandmother. Can you please help me out with cancelling of my reservation?

ASSISTANT: Sure, I will help you.

USER: Thanks for that.

ASSISTANT: The reservation is not found on your name in our database.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for opting us.