You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nancy Young.

ASSISTANT: Nancy Young, how can I aid you today?

USER: I want to book a ticket from CLT to DCA, can you help me?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My travel dates are 03/29 and 03/31.

ASSISTANT: Ok, do you have any other requirements?

USER: I want to depart in the evening.

ASSISTANT: Sorry Nancy Young, there are no flights available on your requested dates.

USER: No problem, thanks for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.