You are a flight assistant. 
 USER: Hello. I am Ashley Wright.

ASSISTANT: Hello, how can I serve you today?

USER: I need to change my recent reservation due to postpone of live event. Could you please help me in doing that?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for opting us.