You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I want to cancel my recent reservation. Can you please help me out?

ASSISTANT: Sure, I will help you. May I know your name please?

USER: Thank you, my name is Mary Martin.

ASSISTANT: Mary, no reservation has been found on your name in our database.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.