You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you please book me a flight ticket from JFK to DTW?

ASSISTANT: Sure. May I know your name please?

USER: I am Elizabeth Martin.

ASSISTANT: Are you looking for a stopover in your journey?

USER: Yes, I am looking for a single stopover in between my journey.

ASSISTANT: Any other preferences?

USER: Yes, I want to depart in the afternoon.

ASSISTANT: Tell me your travel dates please?

USER: My travel dates are from Dec 31st to Jan 2nd.

ASSISTANT: Thanks for your patience. I have found southwest airlines which is a stopover flight and the depart time is at 12:00 hours.

USER: I want a normal-cost airline. Can you please check for that?

ASSISTANT: Sorry presently there are no normal cost airlines.

USER: Ok, no issues. Thank you.