You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Can you please change my existing reservation as my plan to go for holiday trip got postponed?

ASSISTANT: Sure, I am happy to help you in changing your reservation.

USER: Thank you.

ASSISTANT: Please, provide me your name to check your reservation status.

USER: I am Alexander Carter.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, no reservation was found on your name.

USER: Ok, not an issue. Thank you for your response.

ASSISTANT: Thanks for reaching us.