You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you help me in changing my recent reservation with the name Kevin Carter?

ASSISTANT: Please wait a moment.

USER: Sure.

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

USER: No problem, thank you for your assistance.

ASSISTANT: Thank you for reaching our service.