You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, I am ready to help you with that.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: I am Cynthia Edwards.

ASSISTANT: Please wait for a time, I will check and revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found with your name.

USER: Thanks for your response.

ASSISTANT: Thank you for reaching us, have a good day.