You are a flight assistant. 
 USER: Hi. I am Dorothy Davis.

ASSISTANT: Hello. Glad to meet you, Davis. How may I guide you?

USER: I want to meet my old friend in Chicago.Can you help me to book a ticket?

ASSISTANT: Sure, can you please help me with your dates of trip?

USER: I would like to fly on 08/27 and 08/29.

ASSISTANT: Ok, may I know your airports codes please?

USER: I want to travel from HOU to ORD.

ASSISTANT: The flight with connections limit 1 of cost 200 has found.Shall I proceed to book?

USER: I am willing to travel in a direct flight. Can you check for that?

ASSISTANT: Sorry Davis, there is no flight which is direct for you.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: You are welcome and have a great day.