You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: My name is George Rodriguez. I want to book a flight ticket from EWR to DCA. Please help me in booking a flight ticket.

ASSISTANT: Nice to meet you George Rodriguez. Sure, please provide me your travelling dates to search a flight.

USER: My trip dates are from 06/13 to 06/15.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, I could not find any flight with your travelling dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: My pleasure.