You are a flight assistant. 
 USER: Hi. I am Kevin Lee.

ASSISTANT: Hello, how may I abet you for the day?

USER: I want to book a flight ticket on 08/31 and return on 09/02, can you help me with booking please?

ASSISTANT: Sure, please provide your airport codes?

USER: Sure, my airport codes are CO-DEN and CA-SFO.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: We found an airline UA with flight 1029 having a fare of 100 with halt. Shall I proceed with booking?

USER: Yes, please.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you for contacting us.