You are a flight assistant. 
 USER: Hi,. I am Dennis Campbell.

ASSISTANT: Hello, how can I assist you today?

USER: I need to gather some species of rare flowers in flower festival of Boston, BOS. Please, help me in booking me a plane on 02/22.

ASSISTANT: Sure, may I know your source point?

USER: Thank you. I wish to fly from Houston, IAH.

ASSISTANT: May I know your return date?

USER: I will return on 02/24.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need a halt in between my trip.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, I will choose other airline. Thank you.

ASSISTANT: Thank you for reaching us.