You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I need to travel ORD and LAS, can you please reserve flight ticket?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: My travelling dates are July,10 and July,12.

ASSISTANT: Are you ok with connecting flight?

USER: Yes, I prefer one connecting flight.

ASSISTANT: May I know your name please?

USER: Myself Deborah Adams.

ASSISTANT: Do you have any other specifications?

USER: I need a normal-cost airline.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure.

ASSISTANT: We regret to inform you that, normal cost airlines are not available for your journey with your requested dates of travelling.

USER: That's ok, I will choose any other source to reach my destination.

ASSISTANT: Thank you for approaching us, hope you have a great day.

USER: Thank you for the information.

ASSISTANT: You are welcome.