You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to change my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, may I know your name?

USER: My name is Linda Campbell.

ASSISTANT: Please wait a moment, let me check with your details.

USER: OK.

ASSISTANT: Sorry, there are no active reservations on your name to change.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for reaching our service.