You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Helen Turner.

ASSISTANT: Helen, how may I help you?

USER: I need your help in cancelling my recent reservation.

ASSISTANT: Sure Helen, wait a moment.

USER: Ok.

ASSISTANT: Unfortunately, there is no reservation found for you.

USER: It's ok. Thank you for your response.

ASSISTANT: You are welcome, Thank you for choosing us.