You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Due to serious injury for my mother I want to change my reservation.

ASSISTANT: Sure, can I know your name?

USER: My name is Debra Martin.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Ok, fine. Thank you for the information.

ASSISTANT: You are welcome.