You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I would like to change my flight reservation as I am sick, can you please help me?

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: Thank you. I am Patricia Moore.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status.

USER: Sure.

ASSISTANT: I am sorry to say you that there is no reservation found under your name in our database.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing us.