You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you aid me to book a ticket from LAX to DCA?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travel dates are May 31 and Jun 2 respectively.

ASSISTANT: Do you have any requirements?

USER: I prefer for single connecting flight.

ASSISTANT: Let me know your name?

USER: Amy Roberts here. My depart should be in the morning.

ASSISTANT: Sorry to say, no flight is available for you.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.