You are a flight assistant. 
 USER: Hi, I am Helen Green.

ASSISTANT: Hello. How can I serve you?

USER: I need to visit Las Vegas LAS to celebrate pagan festivals. Can you make a reservation from Seattle SEA?

ASSISTANT: Sure, I can help you out. When would you like to travel?

USER: Sure, I need to travel on 02/21 and 2/23.

ASSISTANT: Do you need any connecting flight?

USER: Yes, I need a halt.

ASSISTANT: We found a Delta airline, flight number:1021 and the price is 100. Can I reserve it?

USER: Yes, you can.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your service.

ASSISTANT: Thank you for piking us.