You are a flight assistant. 
 USER: Hi. William Jackson here.

ASSISTANT: Hello, how can I help 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, let me know your travelling dates?

USER: The travel dates are from Oct 15 to Oct 17.

ASSISTANT: Do you have any connection limit?

USER: I prefer a stopover flight.

ASSISTANT: May I know your source airport code?

USER: The airport codes are from IAH to LAX.

ASSISTANT: Is there any other specifications?

USER: That is it.

ASSISTANT: We found a United airline with flight number 1018 and fare 100 with class is economy. Shall I proceed with booking?

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

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.