You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gary Johnson here.

ASSISTANT: How can I help you at this moment?

USER: Actually, I am looking for a flight having single connection because my friend also booked the same flight that I want to travel, so can you please help me out with booking of a flight ticket from Washington on 11/25?

ASSISTANT: Sure, I am happy to help you in booking flight ticket. Could you please mention your preferable airport code names?

USER: Thank you for considering my request. I will prefer IAD and LAS as my origin and destination airport codes respectively.

ASSISTANT: Is there any return trip that your planning to Washington?

USER: Yes, I need a return ticket also. Please book my return ticket on two days later of my departing.

ASSISTANT: Can you please reconfirm your exact return date?

USER: Sure, it's on 11/27.

ASSISTANT: Thank you for providing your travel details. I will put the conversation on hold to check the best flights available in your route.

USER: Ok, take your time.

ASSISTANT: Based on your information, UA airline is ready to serve you with 1 connection with a minimum fare of 300 is available for you. Shall I proceed with this?

USER: That's fine for me, you can proceed with booking.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1019.

USER: Thank you for your assistance in booking of my ticket.

ASSISTANT: You are welcome Gary Johnson.