You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I'm planning to visit Washington, can you please book a ticket from CLT to IAD?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my planned departure and return travel dates are 6th and 8th of April.

ASSISTANT: Do you have any connection limit?

USER: I prefer direct flight.

ASSISTANT: May I know your name?

USER: My name is Kevin Johnson.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your specified connection limit.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for reaching us.