You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Amanda Carter, want to change my reservation dates as I have extend my trip. So, can you help me in this?

ASSISTANT: Sure, I am here to help you with that. Please wait for a minute. Sorry to say that, there is no reservation found on your name in our database.

USER: That's fine, thank you.

ASSISTANT: Thank you for consulting us.