You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Will you please assist me in cancel my recent reservation?

ASSISTANT: Sure, I will help you. May I know your name please?

USER: Charles Brown.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Charles Brown, no reservation has been found on your name in our database.

USER: No worries, thank you.

ASSISTANT: Thank you for choosing us.