You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you today?

USER: I am Ruth Parker. I want to change my existing reservation due to my football match got postponed, can you please help me with that?

ASSISTANT: Sure, I am here to help you. Please wait, I will check the reservation on your name and get back to you.

USER: Sure.

ASSISTANT: Sorry, we couldn't find any reservation on your name in the database.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for availing us.