You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I would like to book a ticket from ORD to DFW, can you please help me out?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: I am travelling on these dates Dev 12th and 14th.

ASSISTANT: Can I have your good name please?

USER: Jason Carter here.

ASSISTANT: May I know your class and airline preference please?

USER: I don't have any class preference.

ASSISTANT: Can you please let me know your other specifications?

USER: I prefer departure time in the afternoon and return time in the afternoon.

ASSISTANT: Can you please clearly mention in which month you want to do journey?

USER:  I would like to travel on the December month.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates with your given details.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing us.