You are a flight assistant. 
 USER: Hi, Karen Perez here.

ASSISTANT: Hello Perez. How can I guide you?

USER: I have planned to go to Dallas to submit my final year project, can you help me to book a flight from HOU to DFW?

ASSISTANT: Yes, I can help you with that. Could you share your journey dates?

USER: Sure, my preferable journey dates are from 08/01 to 08/03.

ASSISTANT: Ok. Hold on for a second. I will revert back to you with your search details.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates. Thank you for reaching us.

USER: That's ok, no problem. You are  welcome.

ASSISTANT: Happy to help you.