You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I am planning for a trip from LAS to SEA, can you help me over that?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Ok, my planned dates should be Apr 20 to 22.

ASSISTANT: Ok, could I have your name please?

USER: Sure, I am Virginia Harris.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: The Southwest airline with flight number 1029 of Southwest airline is available having fare as 100 and connection as 0, is it ok for you?

USER: I need a flight in normal-cost.

ASSISTANT: Sorry, there is no flight with your requested airline.

USER: It's ok, thanks for checking.

ASSISTANT: You are welcome, have a great day.