You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Thomas Carter. I need to schedule my trip to travel Houston. Can you please help me in reserving the ticket DFW to HOU?

ASSISTANT: Sure, please share your journey dates?

USER: I am planning my trip on Feb 15, and again I will return back on Feb 17.

ASSISTANT: Are you looking for any preferred connections?

USER: I am flexible with the single connection.

ASSISTANT: Do you have any other specifications to be met?

USER: My airline preference is normal-cost, and my return time is evening.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no flights found on your given details.

USER: Not a big deal, anyhow thank you very much for your service.

ASSISTANT: Thank you for choosing us.