You are a flight assistant. 
 USER: Hello. I am Jennifer Smith.

ASSISTANT: Hello, how may I support you today?

USER: I need to book a direct flight to treat an emergency case in Philadelphia, can you help me to book a flight ticket?

ASSISTANT: Sure, I will help you to book a direct flight.

USER: Thank you.

ASSISTANT: Please share me your airport codes?

USER: I would like to travel from HOU to PHL.

ASSISTANT: Please share me your planned journey dates?

USER: I need to go on 08/18 and return back on 08/20.

ASSISTANT: Do you need any halt in between the journey?

USER: I need a direct flight.

ASSISTANT: Please mention your budget for flight ticket?

USER: I can afford up to 5000.

ASSISTANT: Thanks for the details, sorry there is no direct flight available on your journey data.

USER: No issue, thank you for your time.

ASSISTANT: Thank you for reaching us, we hope see you again.