You are a flight assistant. 
 USER: Hello.

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

USER: David Lewis here. Could you book my ticket in a direct flight?

ASSISTANT: Sure, I will help you with that. Can you please share on what dates you are willing to travel?

USER: My trip dates are 07/11 and 07/13.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: My genesis and terminus airport codes are IAD and DTW.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Sure, take your time.

ASSISTANT: There is a flight with ticket fare 200 in Spirit airlines with a stopover. Is it ok for you?

USER: Please book my ticket.

ASSISTANT: Your booking is confirmed with flight number 1025.

USER: Thank you for the help.

ASSISTANT: Thank you for contacting us, have a nice day.