You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I would like to head from San Francisco to attend a movie opening ceremony at DFW. Can you help me in booking a direct flight?

ASSISTANT: Sure, I am here to help you. Can you please provide your price?

USER: It should be within 500.

ASSISTANT: Ok, please provide your source airport code.

USER: My journey is from SFO.

ASSISTANT: Ok, Kindly mention your travelling dates.

USER: I will start on 09/09 and end on 09/11.

ASSISTANT: Ok, please wait for a moment, I will examine the availability of flights and revert you.

USER: Ok.

ASSISTANT: Thank you for waiting, we found a flight with two connections in between the journey.

USER: I need a direct flight.

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

USER: Ok, thank you.

ASSISTANT: Ok, May I know your name?

USER: I am Stephanie Carter.

ASSISTANT: Ok, Thank you for choosing us.

USER: Thank you.