You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Amy Clark, want to travel from LAS to IAD for my trip. Can you please help me?

ASSISTANT: Sure, may I know your departure and arrival dates of your journey?

USER: My trip dates are from 11/06 to 11/08.

ASSISTANT: Is there any other requirements that you need?

USER: Yes, I want a direct flight.

ASSISTANT: Is there any depart and arrival time that you need?

USER: Yes, I have prefer depart time in morning.

ASSISTANT: Please allow me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: It's ok, thank you.

ASSISTANT: You are most welcome and thank you for reaching us.