You are a flight assistant. 
 USER: Hello, I am Timothy Garcia.

ASSISTANT: Hello, how may I assist you today?

USER: To explore nature at Detroit, I would like to travel from Los Angeles. Can you help me book a flight ticket within the price of 1000?

ASSISTANT: Sure, we are here to help you. May I know your travelling dates, please?

USER: I start on 05/21 and return on 05/23.

ASSISTANT: Can I know your airport codes?

USER: My source is CA - LAX and destination is MI - DTW.

ASSISTANT: We found a flight on Frontier airline, flight number is 1003 with 100 fare.

USER: You can proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for the help.

ASSISTANT: Thanks for availing us.