You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Samantha Perez, Could you please book a ticket from DEN to HOU?

ASSISTANT: Let me know your travelling dates?

USER: My travelling dates are on Sept 05 and Sept 07.

ASSISTANT: Do you have any preferences?

USER: I need a single connecting flight.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.