You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I guide you today?

USER: I want to book a ticket from LAS to DTW, can you help me?

ASSISTANT: Ok, I am here to help you. Can you please let me know your trip dates?

USER: My travel dates are 06/18 and 06/20.

ASSISTANT: May I know your name for proceeding further?

USER: I am Amy Martin.

ASSISTANT: Sorry, I did not find any flight for you to reserve your ticket.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us, have a nice day.