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

ASSISTANT: Hello, how can I aid you?

USER: I am planning to shoot documentary on the most haunted place Harvard Exit Theatre in Las Vegas. Can you book me a ticket in the evening flight?

ASSISTANT: Sure, may I know your travel dates?

USER: I would start on Oct 23rd and return on 25th.

ASSISTANT: Kindly mention your airport codes?

USER: My origin is MCO and destination is LAS.

ASSISTANT: Do you have any specifications?

USER: Yes, I need 1 flag stop.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for opting us.