You are a flight assistant. 
 USER: Hello, I am Nicole Lopez.

ASSISTANT: Hello, how can I help you?

USER: I need to change my existing reservation, can you please help me?

ASSISTANT: Sure, I am here to help you. Please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting,. Sorry there are no flights found on your name.

USER: Ok, thank you for your response.

ASSISTANT: Thanks for connecting us, have a nice day.