You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. May I know your name?

USER: Myself Patricia Carter.

ASSISTANT: How are you doing Patricia?

USER: I want to cancel my recent reservation. Can you please help me? I am fine thank you.

ASSISTANT: OK, please wait a moment and I will be back with details.

USER: Sure.

ASSISTANT: Sorry, there is no existing reservation to cancel.

USER: OK, no issues. Thank you.