You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mary Hall here.

ASSISTANT: How can I help you at this moment?

USER: I want to cancel my recent reservation, can you help me in this one/.

ASSISTANT: Sure, I am here to help you. Please, give me a moment.

USER: Sure.

ASSISTANT: Sorry to say that, we have not found any reservation on your name in our database.

USER: No issues, thank you for the information.

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