You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Nicole Moore, can you help me for changing my existing reservation?

ASSISTANT: Sure Nicole.

USER: Thank you.

ASSISTANT: Please wait, I will get back to you.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry Moore, no reservation found under your name.

USER: Oh! No problem, thank you for your services.

ASSISTANT: Thank you, have a great day.