You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: Can you aid me to book a flight ticket from DFW to HOU?

ASSISTANT: Sure, could I have your trip dates, please?

USER: My trip dates are June 20 and June 22.

ASSISTANT: Is there any connection limit?

USER: I prefer for connecting flight.

ASSISTANT: Do you have any other specifications?

USER: My return time should be in the afternoon.

ASSISTANT: On what name, do I need to reserve the ticket?

USER: Katherine Thomas here.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: Thank you.

ASSISTANT: Thank you for reaching us.