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

ASSISTANT: Hello, how can I support you?

USER: I want to go for holiday trip with my friends to Las Vegas, LAS. Can you please book a ticket on 03/30?

ASSISTANT: Sure, please mention your return date.

USER: I will return on 04/01.

ASSISTANT: Ok, let me know your source point.

USER: It is Atlanta, ATL.

ASSISTANT: Ok, may i know your budget?

USER: I can afford only 200.

ASSISTANT: Sorry, we are unable to provide you flight in between your journey points due to terminal up gradation at your destination airport.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for consulting us.