You are a flight assistant. 
 USER: Hello. I am Ashley Carter.

ASSISTANT: Hello, How can I help you?

USER: I am planning to travel from EWR to DCA. Could you please help me to book a ticket?

ASSISTANT: Sure, May I know the travel dates?

USER: My travelling dates will be on 02/01 to 02/03.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.