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

ASSISTANT: Hello, How can I help you?

USER: I am planning to attend for food festival at Las Vegas, can you please book me a flight ticket from Phoenix?

ASSISTANT: Sure. May I know your travelling dates?

USER: I would like to depart on Dec 11 and return on Dec 13.

ASSISTANT: Do you have any preferences?

USER: Price must be under 1000. I need a stopover in between my journey.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: There are no flights found on your data.

USER: Ok, I will check with another agency. Thank you for the information.

ASSISTANT: Thank you.