You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please guide me to reserve a flight ticket? Because I have an examination in Las Vegas, so I need to go there.

ASSISTANT: Sure, I am happy to help you. Can you please let me know your travelling dates?

USER: Thank you. I would like to travel on the dates of Nov 19 and Nov 21.

ASSISTANT: Kindly mention your nearest source airport code.

USER: The nearest airport to my source location is OAK.

ASSISTANT: Do you need any break in between journey?

USER: Yes, I would prefer to travel in a flight which is having at least single stop-over.

ASSISTANT: Is there any other specifications for you?

USER: No, I didn't have any other specifications.

ASSISTANT: May I know your good name?

USER: My name is David Harris.

ASSISTANT: Thanks for providing details, we found a connecting flight in United Airlines with a fare of 100 which departs at 16:00 and return at 8:00. Shall I proceed for booking?

USER: I am ok with this flight, please proceed with the ticket booking.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1005.

USER: Thanks a lot for your guidance in reserving the ticket.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.