You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you at this moment?

USER: James Collins here. Help me in booking my flight ticket from Las Vegas to Washington as I need to attend my cousin's marriage.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please provide your departure and arrival travelling dates?

USER: As the marriage is on Apr 6, I want to start my journey on Apr 5. I intend to return on Apr 7.

ASSISTANT: Ok, may I know your corresponding airport codes of travelling?

USER: I would like start from LAS, my landing airport code is DCA.

ASSISTANT: Do you need any halt in between the journey?

USER: Yes, I prefer a halt.

ASSISTANT: Ok, do you prefer business or economy class?

USER: I am comfortable with any class.

ASSISTANT: Ok, how much you can afford for a flight ticket?

USER: I  can afford up to  5000.

ASSISTANT: Ok, do you have any other preferences?

USER: No other preferences, you can go ahead with checking the availability of flights.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: We found a Spirit airline with fare of 100 and a halt in between the journey matches your schedule. Shall I proceed with booking?

USER: You can proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1008.

USER: Thank you for your best service.

ASSISTANT: Thank you for connecting with us.