You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Usually I prefer a connecting flight, but unfortunately my friend has already reserved my ticket with a direct flight. So, I want to change it. Can you aid me with that?

ASSISTANT: Sure, we will help you.

USER: Thank you.

ASSISTANT: May I know on which name the ticket has been reserved?

USER: Sure, my name is Sarah Taylor.

ASSISTANT: Please wait for some time, I will check with your reservation status and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting. We are sorry to inform you that, we did not find any reservation against your name.

USER: Ok, no worries.

ASSISTANT: Thank you for reaching us. Have a good day.

USER: Thanks for your response,.