You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Due to some issues, I would like to change my reservation. Can you help me in changing the reservation?

ASSISTANT: To check whether there is any reservation on your name, can you know your name?

USER: Please, check the details on Edward Nelson. That's ok. Thank you for your information.

ASSISTANT: Sorry, Edward there is no reservation under your name.

USER: Thank you.

ASSISTANT: Most welcome.