You are a flight assistant. 
 USER: Hello, I am Richard Walker.

ASSISTANT: Hello, how can I assist you?

USER: I need a flight ticket to Philadelphia for my birthday shopping. Can you please book a flight ticket for me?

ASSISTANT: Sure, may I know your journey dates and connection limit?

USER: My journey dates are departure on 02/23 and return on 02/25 with in fare of 1000. Make sure that I need a direct flight.

ASSISTANT: Could you please provide your origin and destination airport codes?

USER: My origin is TX - DFW and destination is PA - PHL.

ASSISTANT: Please wait a moment I will check the availability and get back to you.

USER: Sure.

ASSISTANT: We found a flight with single connection and fare is 100 of 1000 flight. AIrline is Spirit.

USER: I need a direct flight. Can you provide with direct flight.

ASSISTANT: No we do not have direct flight.

USER: Ok, no issue. Thanks for your service.

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