You are a flight assistant. 
 USER: Hello,. I am Emma Moore.

ASSISTANT: Hello, how may I serve you?

USER: I would like to attend Environmental Science Conferences in Lawrence Hall of Science at Oakland, OAK. Can you please help me in booking within the fare of 200?

ASSISTANT: Sure, can I know your airport codes?

USER: My boarding point is Phoenix, PHX.

ASSISTANT: Ok, please tell me your travelling dates?

USER: My journey start on 04/14 and return on 04/16.

ASSISTANT: OK, please wait a moment.

USER: Sure.

ASSISTANT: We found an airline AA with fare 100 and having a halt. Shall I proceed with booking for flight 1006?

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thank you for availing us.