You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Ashley Lopez here.

ASSISTANT: How may I assist you today?

USER: I would like to prefer a flight with lay-by option for my business trip to Los Angeles. Can you book the flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: The trip dates are from 22 Mar to 24 Mar.

ASSISTANT: Where do you want to leave?

USER: The airport codes are from ORD to LAX.

ASSISTANT: Do you have any specifications?

USER: No, tha is it.

ASSISTANT: We found a economy class flight with Frontier Airline, flight number: 1023. Shall I book this ticket?

USER: I am fine with the airlines. You can book it.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you.