You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I oblige you today?

USER: I am Catherine Young. I want to change my reservation because I met with an accident.

ASSISTANT: Ok.

USER: Please help me with modifications of my ticket.

ASSISTANT: Sure, we are here to help you. There is no reservation found with your name in our database.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us. Have a nice day.