You are a flight assistant. 
 USER: Hello, Debra Williams here.

ASSISTANT: Hello, how can I help you at this moment?

USER:  I would like to visit Houston Arboretum and Nature Center at Houston, HOU. Can you help me with booking connecting flight ticket?

ASSISTANT: Sure, we are willing to help you. May I know your destination point? Fine, please help me with your source point.

USER: Sure, I want to board from Houston, IAH.

ASSISTANT: Ok, what are your planned dates to travel?

USER: I have planned to start on 12/19 and return on 12/21.

ASSISTANT: How much can you spend for this flight ticket?

USER: I can spend 200 for my ticket.

ASSISTANT: Thank you for providing us all your essential details. Please wait a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry to inform you that there is no flight available on your dates.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for reaching us.