You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you at this moment?

USER: I want to book a flight ticket from DEN to LAS. Can you please help me in that?

ASSISTANT: Sure, I am gleeful to assist you.

USER: Thank you.

ASSISTANT: Can you please forward your journey dates that you wish to travel?

USER: My trip dates are Oct 31 to Nov 01.

ASSISTANT: Can you please re-check your travelling dates?

USER: Sorry, my return date is on Nov 02.

ASSISTANT: Do you need any specifications in connection?

USER: I need a direct flight.

ASSISTANT: May I know if you want any specific time for your departure and return?

USER: I am ok with any time.

ASSISTANT: Ok, Do you have any airline preference?

USER: I want to fly in normal cost airline.

ASSISTANT: May I know your good name please?

USER: Myself Anna Lopez.

ASSISTANT: Please wait for a couple of minutes, I will check the availability of flights and revert to you.

USER: Ok.

ASSISTANT: Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thanks for choosing us.