You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Melissa Hall.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Sure, can you please share your travel dates?

USER: I would like to take off on 12/19 and return on 12/21.

ASSISTANT: Let me check for the availability of flight.

USER: Sure, take your time. Make sure that the connection is 1.

ASSISTANT: Melissa, there is no flight available at your request.

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

ASSISTANT: You are welcome.