You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me in booking flight ticket from DCA to attend a seminar at HOU?

ASSISTANT: Sure, I will help you. Please help me with your planned travelling dates.

USER: Thank you, my trip dates are Jan 08 and Jan 10.

ASSISTANT: Please help me with your name.

USER: My name is Brandon Wright.

ASSISTANT: Do you need a break in between your journey?

USER: Yes, I need a break in between the journey.

ASSISTANT: Do you have any other preferences in your journey?

USER: NO.

ASSISTANT: Please allow me a minute.

USER: Ok.

ASSISTANT: Brandon Wright, I am sorry to inform you that there are no flights available for your journey.

USER: That's fine, thank you for the response.

ASSISTANT: Thank you for reaching us. Have a great time.