You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Miller.

ASSISTANT: How may I help you today?

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

ASSISTANT: Sure, please provide your travelling dates?

USER: I would like to take off on 04/20 and return on 04/22.

ASSISTANT: There is a flight available with one connection and the price is 100, can I proceed with the booking?

USER: Please confirm the booking in a economy class.

ASSISTANT: Your ticket has been booked in economy class with Sprint airlines and the flight number is 1000.

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

ASSISTANT: Thank you for reaching us. Have a safe journey ahead.