You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I am Samantha Robinson, can you please help me in modification of my reservation?

ASSISTANT: Sure, I will help you in changing the reservation.

USER: Thank you for considering my request.

ASSISTANT: Sorry, there are no reservations found.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for reaching us.