You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Daniel King here.

ASSISTANT: How may I help you today?

USER: I want to book a ticket from LAX to DFW. Can you check the flight availability in this root?

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

USER: My planned travelling dates are 03/19 and 03/21.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: Make sure that, my return time should be in evening only.

ASSISTANT: May I know your connection limit?

USER: I want a flight with maximum connection of 1.

ASSISTANT: Ok, is there any class preference?

USER: No more, thank you.

ASSISTANT: Do you have any airline preference?

USER: No, I am comfortable with any one.

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

USER: No issues, thank you for the information.

ASSISTANT: Thanks for contacting us.