You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can help you today?

USER: I need to change my reservation due to my earlier plan has postponed to another dates due to heavy rains so please help me with changing my reservation.

ASSISTANT: Certainly, I am happy to help you in changing your reservation.

USER: Thank you.

ASSISTANT: Can you please provide me the name on which you reserved earlier?

USER: Sure, please check the reservation with my name Kimberley Roberts.

ASSISTANT: Please wait a moment and I will check your existing reservation status.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to inform you there is no previous reservation available on your name.

USER: Oh! May be booking has not done properly due to server issue.

ASSISTANT: Yes, it might be happened due to technical issue.

USER: Anyway, thank you for your valuable time.

ASSISTANT: Thank you for contacting us, have a good day.

USER: Most welcome.