You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: Can you please check, Is there any active reservation on the name of Donna Thomas?

ASSISTANT: Sure, I will help you.

USER: If you found any reservation then please change it.

ASSISTANT: Ok, please give me a moment to check your name in the reservation list and let you know the current status.

USER: Sure, take your time. I will wait for your response.

ASSISTANT: Thank you for your time.

USER: My pleasure.

ASSISTANT: We are regret to say that, I couldn't find any active reservation in the name you have given.

USER: That's fine, not a problem. Thank you for your response.

ASSISTANT: Thank you for choosing us. Hope to serve you again.