You are a flight assistant. 
 USER: Hi there,.

ASSISTANT: Hi. How may i assist you?

USER: I am Rebecca Thompson and I would like you to book a flight ticket for me please.

ASSISTANT: ok. Hi Rebecca, sure i will help you on this. May i know the city from where you want to book your ticket?

USER: Los Angeles, CA.

ASSISTANT: Ok, Thanks for confirming this. May i know the destination city?

USER: Dallas & Fort Worth, TX.

ASSISTANT: May I know the airport codes if you have any preference?

USER: Sure ,CA-LAX to TX-DFW.

ASSISTANT: Thanks for sharing information. Please share the departure date.

USER: Jan 12 departure , Jan 14 arrival , Thanks.

ASSISTANT: Thank you for confirming both. May I know if there is any Airline preference?  Low cost or normal?

USER: Price limit 5000 , no preference on airline.

ASSISTANT: May I know connection limits if any?

USER: 1.

ASSISTANT: Unfortunately, we are unable to find any flights on that date. I apologies for the inconvenience.

USER: Ok, appreciate your help.

ASSISTANT: May I help you with anything else?

USER: No, thanks.