You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you for today?

USER: Due to some emergency case, I have to change my ticket reservation on the name Nicholas Anderson, can you please help me?

ASSISTANT: Yes, I am here to help you. Can you help me with your name to check the existing reservation under your name?

USER: Thank you for accepting my request.

ASSISTANT: I have not find any active reservation under your name to change.

USER: Ok, no problem with that , than you for your help.

ASSISTANT: Thank you for reaching out here. Hope you have a nice day.