You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can In serve you now?

USER: Can you please assist me to change my active reservation as my meeting was postponed?

ASSISTANT: Ok, please mention your name to check with your previous booking.

USER: Myself Jason Campbell.

ASSISTANT: Ok, please be on hold for a while till I check with your previous booking.

USER: Ok.

ASSISTANT: I am very apologetic to inform you, there is no reservation by your name in our database.

USER: Ok, no problem.

ASSISTANT: Thank you for connecting with us, have a nice day ahead.

USER: Thank you.