You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a connecting flight ticket to attend an event which is going to held at IL. Can you help me?

ASSISTANT: Sure, please share your planned travel dates?

USER: Oct 21st and 23rd are my travelling dates.

ASSISTANT: Please help me with your airport codes?

USER: HOU and ORD are my airport codes.

ASSISTANT: Any other preferences?

USER: I would like to prefer an economy class.

ASSISTANT: Can I have your name please?

USER: James Young.

ASSISTANT: Sorry, no flights found with your given details.

USER: No issue. Thank you for the information.

ASSISTANT: Thank you for opting us.