You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I amend you?

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

ASSISTANT: Sure, may I know your name to check the reservation list?

USER: I am Steven Harris.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We could not find any reservation by this name.

USER: Thanks.

ASSISTANT: Thank you for approaching us.