You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I would like to attend Environmental Science Conferences in Lawrence Hall of Science at Oakland. Can you do the reservation?

ASSISTANT: Sure, we are here to make your journey comfort. Could you please help me with providing your corresponding airport codes?

USER: My airport codes are BOS-OAK.

ASSISTANT: Kindly assign your preferred dates of travelling?

USER: My journey dates are 01/12 and 01/14.

ASSISTANT: May I know your name?

USER: Gary Hall here.

ASSISTANT: We found a UA airline, flight number:1020 and the price is 200.

USER: Please do the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you so much.

ASSISTANT: Thank you.