You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I serve you?

USER: Please change my existing reservation owing to an emergency.

ASSISTANT: Sure, let me know your name to check the list and revert you.

USER: I am Ruth Edwards.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We could not find any reservation by the name you gave.

USER: Thank you.

ASSISTANT: Thank you for approaching us.