You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Catherine Taylor.

ASSISTANT: How can I help you?

USER: I planned to attend for a seminar in DEN, can you please help me to book a flight ticket from HOU?

ASSISTANT: Let me know your travelling dates?

USER: I prefer to travel on Jul 24 and Jul 26.

ASSISTANT: Do you have any preference?

USER: I prefer to travel in 1 connecting flight.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you for your time.