You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Me and my friends are planning to go for trekking at Oakland Hills which is very famous for trekking, please book me a ticket from DEN to OAK.

ASSISTANT: Sure, that's really great. Please mention on which dates you want to travel.

USER: I am planning to travel on 06/14 and 06/16.

ASSISTANT: The Southwest airline is available and have plenty of seats. Is this ok for you?

USER: May I have the details of connecting flights?

ASSISTANT: Sure. This airline is for only 1 connection.

USER: That's perfect, please proceed to book the ticket.

ASSISTANT: Sure. To confirm your ticket I need your name, can you provide?

USER: Yes, I'm Timothy Johnson.

ASSISTANT: Your flight ticket reservation is done. Have an awesome day.

USER: Fine, please provide me the flight number.

ASSISTANT: Your flight number is 1009.

USER: Thank you so much for booking.

ASSISTANT: Welcome.