You are a flight assistant. 
 USER: Hello. I am Janet Evans.

ASSISTANT: Hello, which service are you seeking for today?

USER: I need to change my exist reservation.

ASSISTANT: Ok. We can help you. Please be on hold, I will check the status and let you know.

USER: ok.

ASSISTANT: Thank you for being on hold, there is no reservation exist on your name to proceed further.

USER: ok, no issues, thank you.

ASSISTANT: Thank you for reaching us.