You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you?

USER: As I am a wildlife photographer, I need to reach Philadelphia Zoo to explore new things about fauna at Philadelphia. Can you please help me to book a flight ticket within the fare limit 5000?

ASSISTANT: Sure, I would be happy to help you. May I know your name for to book a flight ticket?

USER: You can book the ticket on the name William Clark.

ASSISTANT: Can you share me your take off and landing point?

USER: I would like to start from Houston, TX-AUS for this time. My landing point is Houston, TX-HOU.

ASSISTANT: Do you need any halt or direct flight in between your journey?

USER: It's a long journey I am happy If I get a break in between my journey.

ASSISTANT: Let me know when you are willing to travel?

USER: I need to reach Houston on 10/31 and I will return with in two days that is on 11/02.

ASSISTANT: Ok, wait for a while I will check the availability of flights on your preferred dates and get back to you.

USER: Sure, take your time.

ASSISTANT: Thanks for your precious time.

USER: Ok.

ASSISTANT: We are glad to notify that we found UA airline with flight number 1017 matching with your essentials.

USER: That's perfect, please reserve me a seat.

ASSISTANT: Your ticket has been confirmed under fare of 200 with a stop over.

USER: Thanks for being my helping hand in booking.

ASSISTANT: Thanks for approaching us. Have a safe journey.