You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Michael Miller, I want to book a direct flight from Charlotte. Can you please help me in booking my flight ticket to Washington DC-IAD?

ASSISTANT: Sure, could you please provide your journey dates?

USER: My journey dates will be 01/26 to 01/28.

ASSISTANT: May I know your budget for airfare?

USER: I can afford up to 5000.

ASSISTANT: Let me know your boarding point?

USER: My boarding point is at NC-CLT.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for your time, sorry, no flights found on that route.

USER: Its ok, thank you for your effort.

ASSISTANT: Thank you for opting us.