You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you find a flight for me from DCA to IAH?

ASSISTANT: Sure, can you please let me know your travel dates?

USER: Ok, my trip dates are from Jan 12 to 14.

ASSISTANT: Do you have any connection limit preference?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I need a flight in normal-cost.

ASSISTANT: Could you help me with your name please?

USER: Sure, I am Katherine Clark.

ASSISTANT: Thank you for sharing all the details that are required. Regret to inform that there is no flight available for the mentioned dates.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.