You are a flight assistant. 
 USER: Hi, Patricia Hill here.

ASSISTANT: Hello Patricia, how can I help you?

USER: I want to change my existing reservation due to some political meeting postpone, can you please help me in this condition?

ASSISTANT: Ok, let me check with your previous reservation.

USER: Sure, take your own time.

ASSISTANT: Patricia Hill, there is no reservation found by your name.

USER: That's fine.

ASSISTANT: Can I help you with any other information or booking, let me know?

USER: Thank you for your information.

ASSISTANT: Thank you for using our services, have a nice day.

USER: Not required, anyways thanks a lot.

ASSISTANT: Most welcome.