You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how do I serve you today?

USER: Stephanie Wilson here. I am planning to meet my friend at NASA space center at Houston, help me in booking my flight ticket with one stop over.

ASSISTANT: Sure, we so happy to serve you. Please, provide your journey dates?

USER: My departure date si 02/15. My return day is 02/17.

ASSISTANT: Ok, can you please help me with your airport codes?

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

ASSISTANT: Please, wait foe a while let me check the flights availability and revert to you.

USER: Sure.

ASSISTANT: We found a flight on Frontier airline, flight number 1026 with 200 fare.

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thanks for reaching us.