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 DEN to HOU?

ASSISTANT: Can you share your trip dates?

USER: I would like to depart on Nov 15th and return on Nov 17th.

ASSISTANT: Do you need any connections?

USER: I am looking for a connecting flight.

ASSISTANT: Are there any other preferences?

USER: I have no other preferences.

ASSISTANT: May I know your name?

USER: I am Lisa Thomas.

ASSISTANT: Connecting flight number 1003 with price 100 in economy class is available. Is it ok?

USER: 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.