You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Amanda Taylor. I am planning to go for twilight tour at Washington, IAD. Can you please book a ticket for me?

ASSISTANT: Sure, can you please help me with your travelling dates?

USER: My depart is on 12/31 and return is on 01/02.

ASSISTANT: Do you have any price limit?

USER: Price limit is 200.

ASSISTANT: May I know your origin airport code please?

USER: Source code is Charlotte, CLT.

ASSISTANT: Please wait for a while.

USER: I need direct flight. Sure.

ASSISTANT: Thanks for your time, sorry there is no flights found on your given details.

USER: No problem. Thank you.

ASSISTANT: Thanks for choosing us.