You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Can you please help me in changing my reservation?

ASSISTANT: Sure, I am here to help you out. Please provide me your name to check the reservation list on your name.

USER: Eric Evans here.

ASSISTANT: Please allow me a moment to check whether any active reservation found on your name or not.

USER: Sure.

ASSISTANT: Sorry Eric Evans, there is no active reservation on your name in our database.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.