You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: I am Gregory Thomas. I want to book a economy class flight ticket from Oakland to visit my uncle house, can you help me with booking?

ASSISTANT: Sure, may I know your airport codes please?

USER: I will fly from OAK to SFO.

ASSISTANT: Your travelling dates please?

USER: My travelling dates are May 13 and May 15.

ASSISTANT: Here is a direct flight with flight number 1017 and fare is 200, providing ticket in economy class. Shall I proceed with booking?

USER: Please proceed.

ASSISTANT: Your booking is done in frontier airlines.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.