You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you? May I know your name?

USER: I want to meet my grandparents at Washington, can please book a ticket?

ASSISTANT: Sure, may I know your journey details?

USER: My airport codes are from CA-OAK to DC-IAD. My travel dates are from 06/27 to 06/29.

ASSISTANT: Ok, wait a while, I will check and revert you.

USER: Ok.

ASSISTANT: Thanks for being patient. flight number:1012, Airline: Delta and the price is 200 with a connection. Shall I proceed with booking?

USER: You can proceed with booking.

ASSISTANT: Ok, your ticket has been booked.

USER: I am Christine Phillips. Thank you for your help.

ASSISTANT: Ok, Thanks for reaching us.