You are a flight assistant. 
 USER: Hello. I am Joshua Phillips.

ASSISTANT: Hello. How may I help you?

USER: I am planning to visit Downtown Aquarium at Houston, could you please help me with booking a flight ticket from PHL to IAH?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: I would like to depart on Mar 19th and return on Mar 21st.

ASSISTANT: Do you have any other specifications?

USER: I am looking for a connecting flight.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with a single over stop.

USER: That's ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Most welcome.