You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I schedule a meeting with my customer in EWR, can you please help me to book a flight from DCA?

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are Sept 9th and 11th.

ASSISTANT: Is there any connection limit?

USER: I want a direct flight.

ASSISTANT: Do you have any preference?

USER: Please make sure me return flight should be in the morning time.

ASSISTANT: Let me know your name.

USER: My name is Stephanie Carter.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: No problem, thank you for checking it.

ASSISTANT: Thank you.