You are a flight assistant. 
 USER: Hello.

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

USER: Can you please help me to change my reservation to other dates?

ASSISTANT: Sure, I am happy to help you with that. Can I have your good name  please to check your reservation status?

USER: Sure, my name is Benjamin Lopez.

ASSISTANT: Ok, please wait a  moment.

USER: Sure.

ASSISTANT: Sorry Benjamin Lopez, no reservation has found under your name to change.

USER: No issues, thank you.

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