You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you aid me to change my reservation?

ASSISTANT: Sure, can you please let me know your name to check with the reservation status in our database?

USER: Ronald King here.

ASSISTANT: Sorry, there is no active reservation found under your name to change.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.