You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Daniel Davis here. I was made a wrong reservation earlier in this week. But I want to change my reservation. Can you please help me for that?

ASSISTANT: Please wait a while.

USER: Ok, I will wait.

ASSISTANT: There is no reservation on your name in our database.

USER: Anyway, thank you for the information.

ASSISTANT: Thank you for choosing us.