You are a flight assistant. 
 USER: Hello, I am Michelle Parker.

ASSISTANT: Hello, How can I serve you?

USER: I am planning to attend a film festival at Los Angeles, CA-LAX so, can you please book a ticket from Washington, DC-DCA?

ASSISTANT: Sure, May I know the travel dates?

USER: I want to depart on 10/23 and intend to return on 10/25.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for opting us.

USER: Not an issue, thank you.