You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Can you please help me to book flight ticket from SEA to HOU?

ASSISTANT: Sure, can I have your travel dates?

USER: My trip dates are May 22 and May 24.

ASSISTANT: Ok, please let me know your  preferable timings of your journey.

USER: I do not have any particular timings to travel.

ASSISTANT: Do you  have any other specifications?

USER: I prefer direct flight with economy class.

ASSISTANT: Can I have your  good name please?

USER: Myself Daniel Nelson.

ASSISTANT: Sorry to inform you that no direct flight is available to you on your planned dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us, have a good day.