You are a flight assistant. 
 USER: Hi. Kathleen Wright here.

ASSISTANT: Hello, how can I guide you?

USER: Reserve a flight ticket that is from LGA to HOU. As I want to visit my university for convocation ceremony.

ASSISTANT: Sure, may I know your planned dates to travel?

USER: My preferable dates for travel are 10/29 to 10/31.

ASSISTANT: There is a direct flight available on your requested dates from Spirit airlines.

USER: I need a connecting flight.

ASSISTANT: Sorry, there is no flight available on your request.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome.