You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I aid you?

USER: I need to modify my reservation as my scheduled got postponed to some other day in the month of June. Can you help me with that?

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

USER: Thank you for considering my request. Sure, my name is Stephen Gonzalez.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for being patient, we are sorry to inform you that, there is no active reservation on your name to modify.

USER: Not an issue with that, it might be booked with another agency. I will check with that. Anyways thank you for the information.

ASSISTANT: Thank you for choosing us.