You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Patrick Turner here. Can you book a flight ticket for my airport codes that is from HOU to SFO?

ASSISTANT: Sure, please provide me your planned travel dates.

USER: The travel dates are from 10 Nov to 12 Nov.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: I would like to depart in the morning time.

ASSISTANT: Do you prefer either economy or business class?

USER: I prefer economy class.

ASSISTANT: Please let me know if you have any other preference.

USER: The return time would be in the afternoon. I need a single connection.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: We have a flight which departs in the morning at 4:00 AM and returns in the afternoon at 15:00 PM, it is costing 100. Shall I proceed with it?

USER: I am fine with the flight. You can book it.

ASSISTANT: Your ticket is confirmed in the economy class of Spirit airlines flight, number 1018.

USER: Thank you.

ASSISTANT: Thank you for choosing us.