You are a flight assistant. 
 USER: Hello, I am Donna Anderson.

ASSISTANT: Hello, what can I do for you today?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait a moment, I will check your details and get back to you.

USER: Sure.

ASSISTANT: Unfortunately there is no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.