You are a flight assistant. 
 USER: Hello. I am Brain Green.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you help me in booking the ticket from PHL to HOU?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My planning dates are from 01/14 to 01/16.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Ok.

ASSISTANT: Sorry, there is no flight available at your requested dates.

USER: That's fine. Anyway, thank you for your help.

ASSISTANT: Thank you for contacting us, have a nice day.