You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need you to book a flight ticket from CLT to IAD. Please help me with it.

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

USER: July 22 and 24 are my planned travelling dates.

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

USER: I would prefer to fly in a connecting flight.

ASSISTANT: Do you have any class preference?

USER: Nothing to let you know.

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

USER: I am comfortable to fly at any time.

ASSISTANT: May I know your good name please?

USER: My name is Robert Thomas.

ASSISTANT: We found Spirit airline with economy class and flight number is 1023 with arrival time is 8:00 hours and departure time is 14:00 hours.Shall I proceed for booking?

USER: Yes, please book the ticket.

ASSISTANT: Your ticket is booked.

USER: Great! Thank you.

ASSISTANT: You are welcome.