You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you today?

USER: I made a reservation earlier to go for a holiday trip with my friends, due to some financial problems I want change my existing reservation.

ASSISTANT: Sure, may I know your good name?

USER: I am Edward Moore.

ASSISTANT: Please wait for a minute, I will revert you.

USER: Ok.

ASSISTANT: Sorry to inform that there is no reservation found with your name.

USER: It's ok, not a problem. Thanks for your quick response.

ASSISTANT: Thank you for reaching us.