You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: Can you please help me in booking a flight ticket from San Francisco, SFO to reach Las Vegas, LAS?

ASSISTANT: Your travelling dates please?

USER: My travelling dates are from Mar 16 to Mar 18.

ASSISTANT: Do you have any specifications?

USER: My return time is afternoon.

ASSISTANT: There is a flight with single connection in Frontier airlines, can I  proceed for booking in economy class?

USER: Sure, you can proceed for booking.

ASSISTANT: On which name can I proceed for booking?

USER: My name is Helen Thomas.

ASSISTANT: Your booking is done in 1007 flight?

USER: Thank you.

ASSISTANT: Thank you for choosing us.