You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Daniel Robinson.

ASSISTANT: How can I aid you today?

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

ASSISTANT: Sure, I will help you with this. Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Daniel, no reservation found by your name in our website.

USER: No problem, thank you very much for checking.

ASSISTANT: It's my pleasure, have a great day.