You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, we are glad to assist you in that.

USER: Thank you.

ASSISTANT: Before proceeding further. May I know your name?

USER: I am Margaret Clark here.

ASSISTANT: Sorry Margaret Clark, based on your name we haven't found any previous flight reservation in airline database.

USER: No problem, thanks for your information.

ASSISTANT: Thanks for reaching us.