You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Myself Jacob Jones. I want to change my reservation as my brother met with an accident. Can you please do that for me?

ASSISTANT: Ok, please hold on a moment I will revert you back with the proper information.

USER: Sure. I will wait for your response.

ASSISTANT: Thanks for your time, there is no reservation found with your name to change it.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thanks for choosing us, have a good day.