You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I have to change my reservation due to  my planned event got  postponed. So  please help me with that.

ASSISTANT: Ok, I am here to help you with that.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Sure, please check the reservation with  my name Benjamin Miller.

ASSISTANT: Please wait for a minute.

USER: Sure, take  your time.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: Oh! It  may not be booked  properly due to server issues while  booking. Anyway, thank you for  your time.

ASSISTANT: Thank you for reaching us.