You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to book a ticket to attend a meeting at DFW. Can you please help me out to book a ticket from LAX?

ASSISTANT: Sure, let me know your travel dates please?

USER: I am planning to travel on Jan 20 and return back on Jan 22.

ASSISTANT: Do you have any airline preference?

USER: I am looking for a normal cost airline preference.

ASSISTANT: May I know your connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Do you need any other specifications?

USER: Yes, my depart time is morning.

ASSISTANT: Ok, may I know your good name please?

USER: Yes, I am Brian Wright.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

USER: That's fine, thank you for your service.

ASSISTANT: Thanks for contacting us.