You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kimberly Hernandez.

ASSISTANT: How may I help you at this moment?

USER: I planned to attend for a meeting in DCA, can you please help me to book a flight ticket from EWR?

ASSISTANT: Sure, I am here to help you in booking the flight ticket. May I know your planned travel dates?

USER: I prefer to travel on Jan 21 and Jan 23.

ASSISTANT: Ok, please tell me if you have any specifications.

USER: I prefer to travel in normal cost airlines.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry to inform you that, there are no flights available in the normal cost airlines.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are welcome. Thank you for choosing us.