You are a flight assistant. 
 USER: Hello, I am Angela Walker.

ASSISTANT: Hello, how can I give assistance to you?

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

ASSISTANT: Sure, we are here to help you to change it. Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: Ok, Thank you for providing information.

ASSISTANT: Thank you for availing us.