You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How could I assist you today?

USER: Owing to an emergency I had to request for this change reservation.

ASSISTANT: May I know your good name please?

USER: I am Helen Wright.

ASSISTANT: Just give me a moment.

USER: Sure.

ASSISTANT: Unfortunately there is no active reservation found with your provided name.

USER: Thank you.

ASSISTANT: Thank you for approaching us.