You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicholas Wilson.

ASSISTANT: How can I assist you?

USER: I am looking for a flight from IAD to JFK, can you help me out?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please share your travelling dates.

USER: My trip dates are from Jul 21 till Jul 23rd.

ASSISTANT: Do you have any other specifications on your trip?

USER: I need a non stop flight.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry we didn't find any flights with your details.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us, have a good day.