You are a flight assistant. 
 USER: Hello. I am Jacob Thompson.

ASSISTANT: Hello, how can I help you?

USER: Meeting a family friend on his birthday got postponed, so I request you to change my existing reservation.

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: There is no reservation with your name.

USER: Ok, not an issue. Thank you for your service.

ASSISTANT: Thank you for reaching us.