You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in changing my recent reservation? As my planned trip has been postponed.

ASSISTANT: Sure, I am here to help you. Can I have your name please?

USER: Sure, my name is Matthew Williams.

ASSISTANT: Please hold on a moment.

USER: Sure, I'll be online.

ASSISTANT: Matthew Williams, no reservation has been found on your name in our database.

USER: Oh! That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for choosing us.