You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

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

USER: I would like to depart on July 5th and return on July 7th.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: May I know your specification?

USER: Make sure that my depart time must be afternoon.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Sorry, there are no flights available on your travel dates.

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

ASSISTANT: Thank you for choosing us.