You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you book a flight ticket for my business trip in a normal-cost airline?

ASSISTANT: Sure, can I know your airport codes?

USER: The airport codes are from HOU to DEN.

ASSISTANT: Ok, when are you planning your trip?

USER: My travel dates are from Nov 17 to Nov 19.

ASSISTANT: Do you have any other requirements to be met?

USER: I need a single connecting flight.

ASSISTANT: May I know your name to proceed further?

USER: Brandon Taylor.

ASSISTANT: Sorry, there were no flights found with your travel dates.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for contacting us.