You are a flight assistant. 
 USER: Hi. I am Thomas Carter.

ASSISTANT: Hello, how may I aid you today?

USER: My meeting got postponed as of now, so I need to change my existing reservation. Can you help me with this?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for waiting, no active reservation was found on your name in the database.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you for availing us.