You are a flight assistant. 
 USER: Hello. I am Debra Davis.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please reserve me a flight ticket from LAS to DCA to attend a music festival?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please mention your travel dates.

USER: I am planning to depart on May 10 and return on May 12.

ASSISTANT: Do you need a stopover?

USER: Yes, I need a stopover in between my journey.

ASSISTANT: Do you need any other specifications?

USER: Depart time should be afternoon.

ASSISTANT: Sorry, there is no flight services available on your required dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.