You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want to meet my twin sister to celebrate our birthday, please book my ticket from OAK to IAH.

ASSISTANT: Sure, On which dates would you like me to book a flight ticket for you?

USER: My itinerary dates are May 20 and May 22.

ASSISTANT: On what name, do I need to reserve your ticket?

USER: Book the ticket on the name of Mary Miller.

ASSISTANT: Let me know your connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I want to travel in economy class.

ASSISTANT: We found 1023 Frontier airlines with single connection with economy class.

USER: Please book my ticket.

ASSISTANT: Your ticket has been reserved with price 100.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.