You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Mary Adams. I would like to visit Rocky Mountain Arsenal National Wildlife Refuge at Denver, DEN. can you please help me in booking?

ASSISTANT: Sure, we are gleeful to help you. Can you please forward your take off airport code?

USER: My source is at Las Vegas, NV-LAS.

ASSISTANT: May I know on which dates you are willing to travel?

USER: My preferred dates of travel are from 11/08 to 11/10.

ASSISTANT: Do you require any stopover in between journey?

USER: I need a halt.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: We found a connecting flight of 1001 UA airlines and the fare of 100. Shall I proceed?

USER: You can proceed with booking.

ASSISTANT: Your ticket has been reserved. Thank you for reaching us.

USER: Thank you.