You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: My name is Nicole Martinez. Can you please help me in changing my existing reservation details?

ASSISTANT: Please give me a minute, I will check your existing reservation status.

USER: Ok.

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

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day.