You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to book a flight ticket from IAH to DFW. Could you help me in booking?

ASSISTANT: Sure, I will help you. May I know your name?

USER: Paul Roberts here.

ASSISTANT: Can I have your journey dates?

USER: My travelling dates are from Apr 14-16.

ASSISTANT: Let me know your connection limit.

USER: I prefer for single connection.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Please, wait for a while.

USER: Ok.

ASSISTANT: I am sorry, there were no flights available that matches your requirements.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.