You are a flight assistant. 
 USER: Hello, I am Thomas Hall.

ASSISTANT: Hello, how may I aid you today?

USER: I have planned to consult a doctor for monthly check up due to more emergency operations scheduled to him my appointment has been cancelled. Can you help me in cancellation?

ASSISTANT: Sure, give me sometime to check and get back to you.

USER: Ok.

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

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for approaching us.