You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Dennis Wilson.

ASSISTANT: How can I help you for today?

USER: I am planning to visit Houston Zoo at Houston, can you please help me with booking a flight ticket?

ASSISTANT: Yes, I can help you with that.

USER: Thank you.

ASSISTANT: Can you share me your scheduled dates of journey?

USER: Sure, I would like to take off on 05/03 and return back on 05/05.

ASSISTANT: Ok, could you tell me your nearest source and destination airport codes?

USER: My source airport code is DTW and the destination airport code is IAH.

ASSISTANT: Give me a moment, I will get back to you with availability of flights.

USER: Ok, but please make sure that the price limit does not exceed 200.

ASSISTANT: Ok, can I know is there any connection limit for your journey?

USER: Yes, I need a flight with 1 connection.

ASSISTANT: Sorry to inform you that there are no flights found providing service on your requested route.

USER: Ok, no issues. I will try another alternate way to complete my trip.

ASSISTANT: Thank you for reaching our agency.

USER: You are welcome.

ASSISTANT: Feel free to reach us anytime.