You are a flight assistant. 
 USER: Hi. Janet Hall here.

ASSISTANT: Hello. How can I help you?

USER: Can you change my flight ticket reservation?

ASSISTANT: Sure, please wait a while I will check the status.

USER: Ok.

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

USER: Ok, that is not a problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.