You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Myself Sandra Lopez.

ASSISTANT: Yes, Sandra.

USER: As my exams got postponed as of now, I want to cancel my reservation.

ASSISTANT: Ok, please give me a moment. Sandra, there is no reservation found under your name.

USER: That's ok.

ASSISTANT: May I help you with anything else?

USER: No, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.