You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Charles Allen here.

ASSISTANT: How may I assist you at this moment?

USER: I want to cancel my recent reservation, can you please help me?

ASSISTANT: Sure, I am happy to help you with that.

USER: Ok, I will be waiting for your response.

ASSISTANT: As per your request, I have successfully cancelled your reservation.

USER: Ok thank you for helping with cancellation.

ASSISTANT: Thank you for reaching us, hope you have a great day.

USER: You are most welcome.