You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, please inform me how can I best serve you now?

USER: I have a plan to visit NASA Space Center located in Houston. Can you please help me in booking flight ticket from LAS to HOU?

ASSISTANT: Sure, we are glad to help you in that flight booking.

USER: Thank you.

ASSISTANT: Ok, can you please let me know your journey dates?

USER: My trip dates are Jan 07 to Jan 09.

ASSISTANT: If you have a choice, what time of day would you prefer to travel and return?

USER: I don't have any particular time.

ASSISTANT: Is there any class preference for you?

USER: I am ok with any class.

ASSISTANT: Do you need any way station in between journey?

USER: I need a flight with single connection.

ASSISTANT: Please share me, if you have any other specifications.

USER: I need to travel with normal cost airline.

ASSISTANT: To proceed further, I need to know your good name. Can you please provide me?

USER: Sure. Myself Carolyn Green.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Sure.

ASSISTANT: We are sorry to say that, there is no flights found on your requested dates.

USER: Ok, no problem. I will choose alternate way to reach my destination.

ASSISTANT: Thanks for approaching us, wish you a nice day.

USER: You are welcome.