You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you aid me to book a flight ticket from CLT to IAD?

ASSISTANT: When are you planning to travel?

USER: Thank you for accepting my request. My planned travel dates are July 22 and July 24.

ASSISTANT: May I know your good name?

USER: Sure, Thomas Adams.

ASSISTANT: Do you need a direct flight?

USER: No, I am looking for a connecting flight.

ASSISTANT: Thomas Adams, I am so sorry to say, there is no flight available for your journey.

USER: That's fine, no issue. Anyway thank you for checking.

ASSISTANT: Thank you for choosing us.