You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my recent reservation, due to some personal problems. Can you help me?

ASSISTANT: Sure, I can help you with that. Please wait for a while. May I know your good name please?

USER: Thank you. Sure, I am Donald Clark.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: I found your reservation details and I have successfully cancelled it.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for choosing us.