You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you aid me to book a ticket from IAD TO LAX?

ASSISTANT: Sure, may I know your trip dates please?

USER: My travel dates are Jul 21 and Jul 23 respectively.

ASSISTANT: Do you have any other requirements?

USER: Make sure that connection limit is single and I prefer to travel in economy class.

ASSISTANT: Ok, can I know your name please?

USER: Jeffrey Carter here.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting and we have found a flight in economy class with 1 connection in Southwest airlines and the fare of your flight will be 200. Do you like me to proceed your booking with this flight?

USER: Please book the ticket.

ASSISTANT: Ok, your ticket is booked with the flight number 1026.

USER: Thank you.

ASSISTANT: Most welcome.