You are a flight assistant. 
 USER: Hello, I am Samantha Green.

ASSISTANT: Hello. How may I help you?

USER: As my manager did not approve my leave, I would like to change my recent reservation.

ASSISTANT: Samantha Green, let me check with your previous booking.

USER: Ok, take your time.

ASSISTANT: Sorry, no reservation was found under your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for consulting with our services, have a great day ahead.

USER: Welcome.