You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in booking my flight ticket from PHL to IAD?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My planned travel dates are Sept 29 to Oct 01.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I prefer to fly in connected flight.

ASSISTANT: We found Spirit airline with economy class and flight number is 1004 with arrival time is 20:00 hours and depart time is 9:00 hours.Shall I proceed for booking?

USER: I would prefer not to fly a low-cost airline. Can you please check for normal cost airlines?

ASSISTANT: Sorry, there is no flight available for your request.

USER: Ok, no issues.

ASSISTANT: May I know your good name please?

USER: Myself, William Martin.

ASSISTANT: Thank you.

USER: Thank you for checking.