You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

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

ASSISTANT: Sure, I am here to help you to change it.

USER: Thank you for accepting my request.

ASSISTANT: Can I have your name please?

USER: Sure, my name is Benjamin Hall.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there was no reservation found on your name to change it.

USER: No worries, thank you.

ASSISTANT: Thank you for availing us.