You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I help you?

USER: I want to book a flight ticket.Can you please help me  with that?

ASSISTANT: I will surely help on that. Can you please provide your flight reservation details.

USER: OK, My source is TX-DFW and my destination is CA-SFO. With the price limit 200 and connection limit is 1.

ASSISTANT: OK, Please wait for some time.

USER: OK.

ASSISTANT: Can you please provide departure and arrival dates.

USER: Yes, The dates I have preferred for travelling is from Jan/22 and to Jan/24.

ASSISTANT: Sorry, No flights found on that perticular day.

USER: OK thank you for your information.

ASSISTANT: Thank you.