You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you please help me in changing my reservation?

ASSISTANT: Sure, may I know your name to check for the previous reservation?

USER: Myself Ronald Wright.

ASSISTANT: Please allow me a moment while I check for the reservation status.

USER: Ok.

ASSISTANT: Ronald Wright, there is no reservation found under your name.

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

ASSISTANT: You are welcome. Thank you for contacting us.