You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I want to travel from ORD to IAD for my project meeting, can you please help me to book my flight ticket?

ASSISTANT: Sure, may I know your planned journey dates?

USER: Thank you. I have to depart on Jan 13th and return back on Jan 15th.

ASSISTANT: Do you have any specifications?

USER: I would like to depart in the evening.

ASSISTANT: May I know your name?

USER: My name is Kevin Hall.

ASSISTANT: Please wait a minute, let me search a best flight for you.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.