You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help that you are expecting from my side?

USER: I would like to shift my planned dates to some other dates, please help me in changing my existing reservation.

ASSISTANT: Sure, I can help you in that one. May I know your name for checking purpose?

USER: My name is Stephanie Hill.

ASSISTANT: Ok, give me a moment to check it.

USER: Sure.

ASSISTANT: Hill, as per your request I have checked in our booking list and there is no reservation found on the name to help you in ticket modification.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are most welcome and have a nice day.