You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: My name is Linda Harris, I need your support in booking a flight ticket to Houston, HOU under 1000 fare. Can you support me in this?

ASSISTANT: Sure, I am here to help you.

USER: Thanks.

ASSISTANT: Could you help me with your source code?

USER: Sure, my source airport code is Philadelphia, PA - PHL.

ASSISTANT: Kindly mention your trip dates?

USER: Sure, my trip dates are 12/23 and 12/25.

ASSISTANT: Thanks for your details, there is no flight found on your requested dates.

USER: Ok, no problem. I will try with other agency. Anyhow thanks for the information.

ASSISTANT: Thank you for availing us.