You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I want to book a flight ticket to HOU to attend for a conference. Can you please aid me for booking from DFW?

ASSISTANT: Sure, can you please forward your journey dates?

USER: My planned dates are on June 28 and 30.

ASSISTANT: May I know your name please?

USER: Ashley Hall is my name.

ASSISTANT: Do you have any restrictions on connection limit?

USER: I need a stopover.

ASSISTANT: Are there any more specifications?

USER: My depart time is morning and return time is afternoon.

ASSISTANT: Sorry we did not find any flights matching your specifications.

USER: Ok, I will choose another alternative to go. Thank you.

ASSISTANT: Thank you for approaching us.