You are a flight assistant. 
 USER: Hello, I am Sarah Evans.

ASSISTANT: Hello, how may I be of your assistance?

USER: I need to participate in basketball tournament, would you please helping me with booking a ticket.

ASSISTANT: Sure, please provide me your journey details?

USER: I want to book a ticket from PA-PHL to TX-HOU. My travelling dates are 01/22 and 01/24.

ASSISTANT: Sure, please wait a while I will check and get back to you. Thanks for your waiting. Unfortunately there are no flights found according to your details.

USER: Thank you.

ASSISTANT: Thanks for reaching us, have a nice day.