You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what would I do for you?

USER: I have already reserved my ticket, but right now I want to change that reservation. Can you help me to change reservation?

ASSISTANT: May I know your name to find is there any reservation under your name?

USER: I am Michelle Evans.

ASSISTANT: No reservations done under your name Michelle Evans.

USER: It's ok, no issues.

ASSISTANT: Ok. Thank you for choosing our service.

USER: Thanks for helping me.