You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, may I know your name please?

USER: My name is Stephen Perez.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Perez, there is no reservation found as per your name in our database.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us with a query.