You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at this moment?

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

ASSISTANT: May I know your trip dates?

USER: I would like to depart on July 10th and return on July 12th.

ASSISTANT: May I know your good name?

USER: I am Donna Miller.

ASSISTANT: Is there any other connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I am looking for a economy class ticket. And make sure that my depart time must be afternoon.

ASSISTANT: Sorry, there were no flights running with your specified requirements.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.