You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, May I know your good name?

USER: I am Donna Thomas.

ASSISTANT: How can I help you?

USER: I want to cancel my recent reservation due to some health issues. Can you help me with that?

ASSISTANT: Please wait a moment I will check and revert you back.

USER: OK.

ASSISTANT: There is no reservation found with your name.

USER: OK, thank you for your response.

ASSISTANT: Thank you for contacting us.