You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: 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 give me your travel dates?

USER: I would like to depart on Dec 13th and return on Dec 15th.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Are there any other requirements?

USER: Make sure that my return time must be morning.

ASSISTANT: May I know your name?

USER: I am Donald Scott.

ASSISTANT: Flight number 1007 with price 400 in business class, with a connection is available. Is it ok for you?

USER: Yes, please confirm the booking.

ASSISTANT: Your ticket has been booked.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for reaching us.