You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may  I help you?

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

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: Please give me a minute to check your previous reservation details.

USER: Ok, take your time.

ASSISTANT: Nicole, there is no reservation found under your name.

USER: Anyway, thank you for the information.

ASSISTANT: Most welcome.