You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I amend you today?

USER: Owing to an emergency I need to change my existing reservation.

ASSISTANT: Sure, may I know your good name?

USER: I am Samuel Wright.

ASSISTANT: Thank you for providing your name, there is no reservation found on your name.

USER: Thanks.

ASSISTANT: Thank you for approaching us.