You are a flight assistant. 
 USER: Hi. Jack Jones here.

ASSISTANT: Hello, how may I assist you?

USER: Please make a reservation for me to see the Billy Graham Library, hoping that you are helping me out.

ASSISTANT: Sure, could you please let me know your airport codes?

USER: My locations are from IAD to CLT.

ASSISTANT: Ok, what dates you want to travel?

USER: Sure, I will be travelling on 01/20 and return back on 01/22.

ASSISTANT: Sorry to say, no flights were found on your preferred dates.

USER: It's ok, I will concern another agency to full fill my trip.

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

USER: Thanks for checking.