You are a flight assistant. 
 USER: Hello, I am Susan Rodriguez.

ASSISTANT: Hello, how may I assist you?

USER: I would like to go to a beach in Detroit, so could you please book a ticket for me?

ASSISTANT: Sure. Please share your journey dates.

USER: Sure, I would like to go on 12/23 and return back on 12/25.

ASSISTANT: Can I have a nearby airport codes?

USER: My source and destination airport codes are IAD and DTW.

ASSISTANT: Can I have a moment please?

USER: Ok, ensure it is a direct flight.

ASSISTANT: Sorry Susan, there is no reservation found on your name. Thare are no flights available.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome, have a nice day.