You are a flight assistant. 
 USER: Hello, my name is Sharon Lopez.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a ticket to meet my family on the occasion of my birthday at EWR with 1 connection. Can you help me to book a ticket under the price range of 500?

ASSISTANT: Sure, Can you please provide your travel dates?

USER: And my journey dates are from 01/25 to 01/27.

ASSISTANT: May I know your airport codes?

USER: I need to start from DCA.

ASSISTANT: Please wait for a while, I will check and revert you?

USER: Sure.

ASSISTANT: Sorry there were no flights found matches with your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your information.

ASSISTANT: Have a great day.