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

ASSISTANT: Hello,. How can I help you?

USER: To explore global culture, I am planning to travel to Las Vegas, LAS. So, can you please help me in booking a flight ticket from New York, EWR?

ASSISTANT: Sure. Please let me know your travelling dates.

USER: I would like to depart on 01/06. My return will be on 01/08.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: It's ok, no problem.

ASSISTANT: Thanks.

USER: Thank you for your kind information.