You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am not able to make my trip so I had postponed my trip in the month of June. Can you help me in modification of my reservation?

ASSISTANT: Sure, I am here to help you. May I know on whose name the ticket has been reserved formerly?

USER: Thank you for your concern. I have done my booking with my name Amy Jones.

ASSISTANT: Sorry Amy Jones, there are no flights reserved on your given name formerly.

USER: Not a problem, it might not booked properly at the time of booking. Anyways thank you for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.