You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, can you please allow me a moment to check for the reservation status?

USER: Sure.

ASSISTANT: Thank you for your patience. Here, there is no active reservation have been found under your name in our database to amend it.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us.