You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Scott Jones, I want to book a flight with in fare of 500 to visit Houston Zoo. Can you book a connecting flight for me?

ASSISTANT: Sure, please share your travelling dates?

USER: I will depart on 10/21 and my arrival date is 10/23.

ASSISTANT: Help me with your corresponding airport codes?

USER: My source point is New York, NY-LGA and destination is TX-IAH.

ASSISTANT: There are no flights found on your requested dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.