You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Jason Thomas.

ASSISTANT: Ok.

USER: I want to change my reservation.

ASSISTANT: Ok, please wait.

USER: OK.

ASSISTANT: Sorry Thomas, there is no active reservation on your name to change.

USER: Ok fine not an issue. Thank you.

ASSISTANT: Thank you for reaching us.