You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: I am planning to book a ticket to meet my friend at LAS. Can you please help me out to book a ticket from SFO?

ASSISTANT: Sure, please share me your trip dates.

USER: I am planning to travel on July 31 and return back on Aug 02.

ASSISTANT: Do you need any specifications?

USER: Yes, my return time should be afternoon and I am looking for a economy class.

ASSISTANT: May I know your connection limit?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Please share me your airline preferences.

USER: I am ok with any airline.

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

USER: I am Charles Adams.

ASSISTANT: We found a Delta airline and 1008 is flight number with a fare of 400. Shall I proceed?

USER: That's fine, please proceed the booking.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for your service.

ASSISTANT: Thank you for opting us.