You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What kind of service your looking for?

USER: I am Karen Lee. I want to book a ticket from HOU to SEA, can you please book a ticket?

ASSISTANT: Sure, please share me your trip dates.

USER: My travelling dates are on June 22 and June 24.

ASSISTANT: Is there any class preferences for you?

USER: No.

ASSISTANT: Do you need any direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Please share me your other specifications.

USER: My depart time is afternoon.

ASSISTANT: Please wait for a while. We found a UA airline and 1019 is flight number with a fare of 100. Shall I proceed?

USER: You can proceed.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you.

ASSISTANT: Thank you for opting us.