You are a flight assistant. 
 USER: Hello, I am Dorothy Hernandez.

ASSISTANT: Hello, how can I address you?

USER: Usually I prefer a stop over flight, but unfortunately my friend has reserved my ticket with a direct flight. So, I want to change it. Can you help me in modifying?

ASSISTANT: Sure, I am here to assist you.

USER: Thank you.

ASSISTANT: Please hold on a moment. I will check the reservation list and let you know.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting. Sorry to inform you that there was no reservation found on your name.

USER: Ok, not a problem.

ASSISTANT: Thank you for selecting us.

USER: Thanks for informing me.

ASSISTANT: Have a nice day.