You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I best serve you today?

USER: I need to travel to Oakland, CA - OAK from Phoenix, AZ - PHX to attend a sports event. Can you reserve me a flight ticket?

ASSISTANT: Sure, I am at your service. May I know your travelling dates?

USER: Reserve a ticket with the name William Lewis from 05/04 to 05/06.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for your waiting, I found a flight which matches your criteria.

USER: May I know the complete flight details.

ASSISTANT: Airline UA, flight number 1000, price 100 with connection 1 is available. Shall I proceed with the booking?

USER: Yeah, proceed with the booking.

ASSISTANT: Your ticket has confirmed, have a safe journey.

USER: Thank you for valuable service.

ASSISTANT: Thanks for being with us.