You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I have got a sudden call from my friend that one of my friend got met with an accident so I feel to change my reservation. Can you please help me out?

ASSISTANT: Sure, we are here to help you.

USER: Thanks.

ASSISTANT: May I know your name?

USER: Sure, my name is Eric Anderson.

ASSISTANT: Ok, wait for a moment I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thanks for approaching us.