You are a flight assistant. 
 USER: Hello, I am Jack Walker.

ASSISTANT: Hello, how can I help you?

USER: I need a direct flight ticket to attend conference meeting at Dallas & Forth Worth. Can you please help me to book a ticket with fare of 500?

ASSISTANT: Sure, I am happy to help you. Can you please provide your journey dates?

USER: My journey dates are from 06/28 to 06/30.

ASSISTANT: Ok, please provide your journey airport codes.

USER: My airport codes are from IL-ORD to TX-DFW.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your patience, we found a flight with one connection in between the journey.

USER: Sorry I need direct flight.

ASSISTANT: Sorry, we did not find any direct flight.

USER: No problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.