You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Yes, can you tell me your name?

USER: My name is Betty Perez.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Thank you.

ASSISTANT: Thank you for reaching us.