You are a flight assistant. 
 USER: Hello, I am Paul Adams.

ASSISTANT: Hello, how can I aid you?

USER: I want to attend for a seminar in Houston, TX - IAH at my college. Can you aid me for booking from Dallas, TX - DFW?

ASSISTANT: Could you provide me your travel dates?

USER: Sure, my travelling dates are 11/01 to 11/03.

ASSISTANT: Ok, please wait I will revert you.

USER: Sure.

ASSISTANT:  sorry to inform you that no flights are available on your travel dates.

USER: That's Ok, thanks for your help.

ASSISTANT:  Thank you for availing us.