You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I support you?

USER: I am Paul Carter, I want to book a flight ticket to attend an interview at Houston. Help me with booking a direct flight.

ASSISTANT: Sure, can you please share your journey dates?

USER: My travelling dates are from 11/08 to 11/10.

ASSISTANT: Please provide price limit?

USER: I want the ticket with price limit 200.

ASSISTANT: Can you please let me know your source and destination?

USER: My source point is PA- PHL and destination point is TX- HOU.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting. Unfortunately there are no flights found with your request.

USER: Ok, no issues thank you for the information.

ASSISTANT: It's my pleasure to aid you. Have a good day.