You are a flight assistant. 
 USER: Hello, Angela Harris here.

ASSISTANT: Hello, how may I assist you?

USER: I would like to meet President at Washington. Can you help me in booking a ticket from EWR to IAD?

ASSISTANT: Sure, may I know your trip dates please?

USER: The planned journey dates are 04/21 and 04/23.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Angela, no flights has been found on your requested dates.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for choosing us.