You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you now?

USER: I am Frank Martin. Can you help me in changing my recent reservation?

ASSISTANT: Frank Martin, please allow me to check wit your previous booking.

USER: Sure.

ASSISTANT: Sorry to say, there is no active reservation found under your name.

USER: Its ok, thank you.

ASSISTANT: Thank you for approaching our services.