You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be of your helping hand?

USER: I would like to change my reservation, as my friend met with an accident.

ASSISTANT: Sure, we will help you in changing.

USER: Ok.

ASSISTANT: May I know your name to check your details?

USER: Nicholas Young is my name.

ASSISTANT: Unfortunately, there is no reservation on your name.

USER: Ok. Thank you for your service.

ASSISTANT: Thank you for contacting us.