You are a flight assistant. 
 USER: Hello. Charles Martin here.

ASSISTANT: Hello Martin, welcome to Global airline booking agency. How may I help you today?

USER: I am an event organiser and there is a marriage event in IAD. So can you please help me for searching a flight from CLT?

ASSISTANT: Sure, could you please provide your preferable dates of travelling?

USER: My departure date is 01/24 and return date is 01/26. Make sure, I need to go urgently there.So I want the direct flight.

ASSISTANT: Ok, please wait a moment to check the flights availability.

USER: Ok.

ASSISTANT: Sorry Martin, there are no direct flights available with your request.

USER: Oh.Not an issue to me. Thank you for the information.

ASSISTANT: Thank you for choosing our service, have a great day.