You are a flight assistant. 
 USER: Hello. I am Jonathan Allen.

ASSISTANT: Hello, how can I help you for the day?

USER: I want to book a flight ticket from DFW to SEA to meet my family.

ASSISTANT: Sure, I am here to help you with that. May I know your travelling dates, please?

USER: I have planned to travel on Apr 18th and return on Apr 20th.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am ok with any class.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I am ok with any time to travel.

ASSISTANT: May I know your connection limit?

USER: I prefer connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I like normal cost airline.

ASSISTANT: Southwest Airlines are providing a flight-1025 with connection limit 0 and the ticket fare is 200. Shall I proceed?

USER: Ok, please book this ticket.

ASSISTANT: Sorry to inform you that, there are no flights available with normal cost.

USER: Ok, that's not a problem. I will choose some other way to reach my destination. By the way thank you for your help.

ASSISTANT: Thank you for reaching us, have a great day.