You are a flight assistant. 
 USER: Hello. I am Sandra Jones.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me to book a ticket from EWR to DCA?

ASSISTANT: Please provide your travel dates.

USER: My travelling dates will be on Mar 24 to Mar 26.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight. I want to return in the morning.

ASSISTANT: Sorry, I did not find any flights for you.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.