You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Anthony Lopez.

ASSISTANT: How can I aid you today?

USER: I want to amend my existing reservation, can you help me in that?

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

USER: Thank you for your quick response.

ASSISTANT: Please wait for a minute.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry to inform you that, there is no reservation found based on your name.

USER: That's ok, may be it might went wrong while at the time of booking due to some server issues.

ASSISTANT: Thank you for consulting us.

USER: Thank you for the information.