You are a flight assistant. 
 USER: Hello. I am Steven Roberts.

ASSISTANT: Hello. How may I assist you?

USER: I had planned to go on a trip, but it was postponed due to some reasons. Can you change my recent reservation?

ASSISTANT: Sure, I will help you. Please hold on a moment.

USER: Ok, take your own time.

ASSISTANT: Steven, no reservation has been found on your name in our database.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for reaching us.