You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am William Smith.

ASSISTANT: William, which help you are expecting from my side?

USER: My holiday trip got postponed, can you help me to change my reservation?

ASSISTANT: Sure, I will help you with that, please wait for a moment to check your reservation status.

USER: Please check my details.

ASSISTANT: Smith, in my database I did not find any reservation with your name.

USER: That is fine.

ASSISTANT: Anything else to help you?

USER: No, I am fine. Thank you for your time.

ASSISTANT: My pleasure, have a nice day.