You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself Jacob Hall. For some issues I want to change my reservation, can you please help me?

ASSISTANT: Ok, I will change the reservation. Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name give.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for choosing our agency.