You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how could I assist you?

USER: I am Helen Perez, I plan to visit my cousin house on there birthday is changed and now she is visiting my house. Can you cancel my reservation?

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Unfortunately no reservation found on your providing name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for opting with us.