You are a flight assistant. 
 USER: Hi, I am Matthew Hall.

ASSISTANT: Hello. How can I aid you?

USER: I would like to fly to Oakland, CA-OAK to participate in trekking at Evens Mountain, can you help me to book a flight ticket from Las Vegas, NV-LAS?

ASSISTANT: Sure. Can I know your travelling dates?

USER: I need to reach Oakland on 08/25 and my return date will be on 08/27.

ASSISTANT: Do you need any connecting flight?

USER: I am happy if I get a connecting flight.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time. We found a UA airline, flight number:1004 and the price is 100.

USER: That's good, you can proceed with the UA airline.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thanks for your kind service.

ASSISTANT: Thank you for reaching us.