You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: Myself Ronald Garcia. I would like to change my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for accepting my request.

ASSISTANT: Please wait a moment to check your reservation.

USER: Ok, I will wait for you response.

ASSISTANT: Sorry Ronald Garcia, no reservation has found under your name to change.

USER: Ok, not an issue. Thank you for your information.

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