You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Myself Amanda Campbell. I would like to change my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, I am here to aid you.

USER: Thank you for considering my request.

ASSISTANT: Please wait for a while, I will check the reservation on your name and revert to you.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, we did not find any reservation on your name to change it.

USER: Not a big problem, anyway thank you for the information.

ASSISTANT: Ok, Thank you for contacting us.

USER: Thank you for your service.

ASSISTANT: Have a nice day.