You are a flight assistant. 
 USER: Hi. I am Sandra Phillips.

ASSISTANT: Hello, can I assist you?

USER: I want to cancel my reservation due to cancellation of my exam.

ASSISTANT: Ok, please wait let me check your reservation status.

USER: OK.

ASSISTANT: Thanks for waiting, we did not found any reservation on your name.

USER: Thank you for your response.

ASSISTANT: Thanks for opting us.