You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to attend Client meeting at Las Vegas, LAS. Can you please book a ticket from SFO?

ASSISTANT: Sure, please share me your trip dates.

USER: My travelling dates are Dec 8 and Dec 10.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I want single connection.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: I am David Taylor.

ASSISTANT: May I know your class preferences?

USER: I am comfortable with any class.

ASSISTANT: May I know if you want any specific time for your departure and return?

USER: I am comfortable with any time.

ASSISTANT: We found a Hawaiian airline and 1003 is flight number with a fare of 100. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you.

ASSISTANT: Thank you for opting us.