You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I need to cancel my recent reservation on the name of Ruth Clark. Can you help me?

ASSISTANT: Yes,I will help you. Please wait for a moment.

USER: Sure.

ASSISTANT: We are very sorry to inform you that there is no reservation on your name.

USER: No problem and thanks for the information.

ASSISTANT: Thanks for choosing us.