You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Myself Joshua Wright, I need to change my existing flight, can you please help me out?

ASSISTANT: Sure Joshua, I will help you with that.

USER: Thank you for helping me out.

ASSISTANT: Please wait a moment to check your reservation status.

USER: Please take your time.

ASSISTANT: Sorry Joshua Wright, no reservation has found under your name to change.

USER: That's not an issue, thank you for helping me.

ASSISTANT: Thank you for choosing us, have a good day.