You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, may I know your name?

USER: My name is Sarah Hall.

ASSISTANT: Hold on a minute.

USER: Sure.

ASSISTANT: We could not found any reservation on your name.

USER: Thanks.

ASSISTANT: Thank you for reaching us.