You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to change my reservation because my trip has been postponed, can you assist me?

ASSISTANT: Sure, will you mention your name for checking the reservation status?

USER: Kevin Carter.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is no reservation found under your name.

USER: No problem, thank you for searching.

ASSISTANT: Welcome, have a great day.