You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to change my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: I am Pamela Carter.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: I am really sorry to inform you that there is no reservation found on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Pamela Carter, thank you for understanding. Thank you for reaching us. Have a great time.