You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to cancel my reservation as I am unable to travel due to some health issues, so please help me to cancel.

ASSISTANT: Can I have your good name please?

USER: Sure, my name is Dorothy Campbell.

ASSISTANT: Please give me a moment, let me check your reservation and get back to you.

USER: Sure.

ASSISTANT: There is no reservation found with your given name in our data.

USER: No problem, thanks for your effort.

ASSISTANT: Thank you for availing us.