You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need to cancel my existing reservation. which is done recently. Can you please help me out?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you for considering my request.

ASSISTANT: May I know your name to check the reservation status?

USER: Myself Dennis Baker.

ASSISTANT: Ok, give me some time.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your service.