You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Can you please cancel a ticket on the name of Donna Brown?

ASSISTANT: Sure, please wait I will get back to you.

USER: Ok, I will wait.

ASSISTANT: Thanks for waiting, we have not found any flight reservation with your given name.

USER: Ok, no worries.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your quick response.