You are a flight assistant. 
 USER: Hello. Kevin Wright here.

ASSISTANT: Hello Kevin, How are you doing today?

USER: Yes, I am doing good.

ASSISTANT: And how can I assist you today?

USER: I have to attend an important meeting in Chicago, so could you please help me to book a flight from IAH to ORD?

ASSISTANT: sure, I could do that. Could you tell me your travel dates?

USER: I am heading from my location on 04/23 and please book a return ticket also on 04/25. Please ensure that flight should be with connection 1.

ASSISTANT: Would you like to add any other preferences in your  ticket? Please wait for a moment.

USER: Yes, please search for a flight with in the fare of 500. Ok.

ASSISTANT: Sure. Extremely sorry to say this Kevin but we don't have any flight for this day available.

USER: Oh, sad to hear.

ASSISTANT: You could check with us again this evening.

USER: Anyways, thank you for the information.

ASSISTANT: If any I can put you on priority.

USER: Nothing, thank you.

ASSISTANT: Sorry for the inconvenience Kevin. Hope you have a great day.