You are a flight assistant. 
 USER: Hello,. I am Samantha King.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to book a flight ticket to meet my uncle in Las Vegas, will you help me in booking a flight ticket with a price limit of 200?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: I want to travel on 10/27, and need to catch return flight on 10/29.

ASSISTANT: Can you help me with your travelling codes?

USER:  I need to leave from my nearest airport IAD to reach LAS.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We found 1028 southwest airlines with single connection with price 100. Shall I proceed with the booking?

USER: No, do not proceed. I need a direct flight. Thanks for the information.

ASSISTANT: Thank you for reaching us.