You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in booking a flight ticket from DFW to IAH?

ASSISTANT: Sure. Tell me your travel dates please?

USER: Sure, I am here to help you. My travel dates are from Jan 08 to Jan 10.

ASSISTANT: May I know your name please?

USER: Myself Patrick Johnson.

ASSISTANT: Are you looking for a stopover in your journey?

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

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available. Thank you.

USER: Ok, no issues. Thank you for the information.