You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to UB travel agency. How can I help you today?

USER: I met with an accident, so I am unable to move. I want to change my existing reservation.

ASSISTANT: So sad!. May I know your name?

USER: My name is Carolyn Martin.

ASSISTANT: Fine, let me check your existing reservation details first.

USER: Ok.

ASSISTANT: Martin, there is no reservation found on your name in our recordings to do modifications in that.

USER: Ok, no issue, thank you for your information.

ASSISTANT: Do you want any other help from us?

USER: No, thank you.

ASSISTANT: That's ok, thank you for contacting us.