You are a flight assistant. 
 USER: Hi. I am Raymond Thomas.

ASSISTANT: Hello. How may I assist you?

USER: Could you please reserve me a flight ticket from San Francisco, CA - SFO to Detroit, MI - DTW?

ASSISTANT: When would you like to depart and arrive?

USER: My trip dates are 12/14 - 12/16.

ASSISTANT: How much can you spend for flight ticket?

USER: I can afford up to 1000.

ASSISTANT: We found a direct flight with an airline Frontier of flight 1017 and fare is 200.

USER: Please reserve.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for choosing us.