You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Donna Rodriguez. As my exam is postponed, I want to cancel my reservation. Can you help me?

ASSISTANT: Yes, I can help you with that. Sorry to inform you that there is no reservation found on your name.

USER: No issue, thank you for checking.

ASSISTANT: Thank you for reaching us.