You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margaret Lopez.

ASSISTANT: How can I help today?

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

ASSISTANT: Sure, please wait for sometime.

USER: Sure.

ASSISTANT: There is no recent reservation found on your name.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for your approaching us.