You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Due to illness I want to change my existing reservation.

ASSISTANT: Sure.

USER: Can you please help me?

ASSISTANT: Please provide your name.

USER: My name is Nicholas Hernandez.

ASSISTANT: Thanks for the information. Please wait for a moment.

USER: Ok.

ASSISTANT: We did not found any reservation on your good name.

USER: Ok, no issue. Thanks for your response.

ASSISTANT: Thanks for opting us.