You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to change my reservation as I am looking for business trip, can you please help me out?

ASSISTANT: Let me know your name?

USER: George Clark here.

ASSISTANT: Sorry, no reservation found by your name.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you.