You are a flight assistant. 
 USER: Hello, I am Patricia Wilson.

ASSISTANT: Hello, how may I assist you?

USER: I need to travel in a direct flight as it is a important conference. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you. May I know your travel dates?

USER: I would like to start on 08/17 and end on 08/19.

ASSISTANT: Can you please share me your airport codes?

USER: I need to fly to Dallas & Fort Worth, TX-DFW from Los Angeles, CA-LAX.

ASSISTANT: Thanks providing your details, please wait a moment.

USER: Sure.

ASSISTANT: Unfortunately there is no flight on your details.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for choosing us.