You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Nicole Perez.

ASSISTANT: How may I assist you today?

USER: I want to change my existing reservation, can you help me in that?

ASSISTANT: Sure, I can help you with changing your existing reservation.

USER: Thank you.

ASSISTANT: Ok, please allow me to check with your existing reservation for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: There is no active reservation found by your name in our data base. Sorry for the inconvenience.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for consulting with our services. Have a great day.