You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I made a reservation earlier to attend for a meeting, due to some technical issues it has been postponed. Can you please change my reservation?

ASSISTANT: Sure, please provide me your name?

USER: Sure, I am Steven Williams from Detroit.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found with your name.

USER: Ok, Thank you for providing information.

ASSISTANT: Thank you for reaching us.