You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I best serve you today?

USER: I am Karen Lopez here. I need to reserve flight ticket from HOU to ATL, can you please help me?

ASSISTANT: Sure, please share me your trip dates.

USER: Sure, my travelling dates are Jul, 01 and 03.

ASSISTANT: Do you need direct flight or connecting flight?

USER: Yes, I need a connecting flight to travel.

ASSISTANT:  Do you have any particular time for departing and returning?

USER: No, thank you for asking.

ASSISTANT: May I know your class preferences ?

USER: I am fine with any class preference.

ASSISTANT: We found a Spirit airline and 1011 is flight number with a fare of 200. Shall I proceed?

USER: Please proceed to booking.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for your service.

ASSISTANT: Thank you for communicating with us.