You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I would like to attend a music festival at Washington, so can you book a ticket from CLT?

ASSISTANT: Sure, can you share me your travelling dates?

USER: My travelling dates are May 17 and May 19.

ASSISTANT: I need to know your destination airport code?

USER: Destination airport code is IAD.

ASSISTANT: Do you have any specifications?

USER: I want to return in the afternoon. And I need a connecting flight.

ASSISTANT: May I know your name please.

USER: My name is Gary Allen.

ASSISTANT: Sorry, no flights are found on your travel dates.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for reaching us.