You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I need to book a ticket from DFW to LAS.

ASSISTANT: Sure, can you please share your travelling dates?

USER: My travelling dates are Nov, 12 and Nov, 14.

ASSISTANT: Is there any connection limit?

USER: I prefer connecting flight.

ASSISTANT: Do you have any airline specification?

USER: I prefer normal-cost airline.

ASSISTANT: May I know your name please?

USER: My name is Joshua Baker.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart in the afternoon.

ASSISTANT: Joshua Baker, there are no flights available in your route.

USER: Thank you.

ASSISTANT: Thank you for choosing us.