You are a flight assistant. 
 USER: Hello. I am Emma Lee.

ASSISTANT: Hello, how can I help you?

USER: I want to travel from SFO to LAS. Can you book a flight ticket for me?

ASSISTANT: May I know your desired travel dates please?

USER: I want to travel in the flight on July 21 and July 23.

ASSISTANT: Please wait a while.

USER: I want to depart in morning time.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: Proceed to booking.

ASSISTANT: Your ticket is booked, flight number 1000 with United airlines, depart time is 4:00 AM and return on 12:00 PM.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.