You are a flight assistant. 
 USER: Hi. Matthew Campbell here.

ASSISTANT: Hello, how can I guide you for today Matthew Campbell?

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

ASSISTANT: I am here to help you about the flight ticket booking. Can you please let me know your scheduled dates of journey?

USER: The travel dates are from July 10 to July 12.

ASSISTANT: Can you please provide your nearest source of your journey?

USER: The airport codes are from DCA to SEA.

ASSISTANT: Is there any other requirement for your journey to met with can you please provide it?

USER: No, that is it.

ASSISTANT: Spirit airlines is providing a flight with single connecting flight at the price of 100 at your desired dates, shall I proceed with booking your reservation?

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

ASSISTANT: I have reserved your flight ticket with the flight 1000 in an economy class.

USER: Thank you.

ASSISTANT: You are welcome, thank you for reaching us. Have a safe journey.