You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Me and my friends planned a round trip but unfortunately my trip was postponed. Can you please change my reservation?

ASSISTANT: Sure, may I know your name?

USER: Janet Hernandez is my name.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for availing us.