You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me to book a normal cost flight ticket?

ASSISTANT: Sure, let me know your travelling dates.

USER: My travel dates are Dec 24 and Dec 26.

ASSISTANT: Please share your airport codes.

USER: My airport codes are HOU and IAH.

ASSISTANT: May I know your connection limit?

USER: I prefer connecting flight.

ASSISTANT: Is there any other specifications?

USER: I would like to travel in normal cost.

ASSISTANT: May I know your name?

USER: I am Justin Williams.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: It's ok, not a problems, thank you.

ASSISTANT: Thank you for choosing us.