You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Amy White. I would like to book a ticket to visit a new place at IAD. Can you please help me out to book a ticket from CLT?

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: Thank you, I want to take off on May 11 and please confirm my return ticket also on May 13.

ASSISTANT: Please wait for a minute.

USER: Ok, please make sure that I want a direct flight.

ASSISTANT: Ok. Sorry to say that, there are no flight's available based on your travelling dates.

USER: Oh! It's ok no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.