You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Myself Paul Hernandez. I want to change my flight reservation. Can you please help me?

ASSISTANT: Sure, I will help you with that. Please wait for a minute.

USER: Thank you.

ASSISTANT: Sorry, no active reservation was found on your name in the database.

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

ASSISTANT: Thank you for availing us.