You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

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

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

USER: I would like to take off on 11/22 and return on 11/24.

ASSISTANT: Let me check for the availability of flight.

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

ASSISTANT: Debra, I am sorry to inform you that 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.