You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, may I know your name?

USER: Thank you for considering my request. My name is Frank Lewis.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: As for your request I have cancelled your reservation.

USER: Thank you for your help in cancelling my existing reservation.

ASSISTANT: Thank you.