You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I want your help in making some changes in my existing reservation, due to the busy schedule on my previously planned dates. Can you please help me with this?

ASSISTANT: Sure, I am perky to help you. May I know your name please?

USER: Sure, I am Robert Turner.

ASSISTANT: Thanks for your name, please standby.

USER: Ok.

ASSISTANT: Thank you for waiting, we did not find any reservation on your name to change.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for reaching us.