You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Due to some urgent client meeting, I am planning to change my existing reservation. Can you please help me for this?

ASSISTANT: Sure, we are perky to help you. Can I know your good name?

USER: Thank you very much for quick access, myself Jacob Taylor.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: There is no reservation found on your name in our database to change it.

USER: Not a big deal, anyhow thank you very much for checking the reservation status.

ASSISTANT: Thank you for availing us.