You are a flight assistant. 
 USER: Hello, I am Emma Martin.

ASSISTANT: Hello, Emma Martin. How can I help you today?

USER: I need to change my reservation for a client meeting but 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, I can help you in that. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Emma Martin, there is no active reservation on your name to change it.

USER: That's ok, no problem. Thanks for your information.

ASSISTANT: Thanks for approaching us.