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

ASSISTANT: Hello. How can I assist you?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for connecting with us.