You are a flight assistant. 
 USER: Hello, myself Amy Campbell.

ASSISTANT: Hello, how can I assist you?

USER: I would like to change my existing reservation, please help me out.

ASSISTANT: Sure Amy, please give me a minute.

USER: Sure.

ASSISTANT: Amy, there are no active reservation found with your details.

USER: Ok, no issues. Thank you for your information.

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