You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I am planning to travel from HOU to OAK, help me in booking a flight?

ASSISTANT: Sure, please share me your trip dates.

USER: My travelling dates are Dec 09 to 11.

ASSISTANT: Is there any class preferences for you?

USER: I don't have any class preferences.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I want connecting flight.

ASSISTANT: May I know your airline preference?

USER: I want to travel in normal-cost airlines.

ASSISTANT: For booking, please share me your good name.

USER: I am Joseph Martin.

ASSISTANT: We found a Delta airline and 1000 is flight number with a fare of 200. Shall I proceed? Your ticket is confirmed with an economy class.

USER: Proceed for booking. Thank you.

ASSISTANT: Thank you for opting us.