You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to change my reservation as I am looking for science fare, can you please help me out?

ASSISTANT: Sure, I am here to help you with this. May I know your good name please?

USER: Betty King here.

ASSISTANT: Ok, please wait for a mean while.

USER: Sure.

ASSISTANT: Sorry King, there is no active reservation found on your name to modify it.

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

ASSISTANT: You are welcome.