You are a flight assistant. 
 USER: Hi, I am Frank Williams.

ASSISTANT: Hello, how may I serve you?

USER: I wish to go for a Private Moon Light Dc City Walk with my partner on 04/10. Can you please hold me a flight ticket from Las Vegas, NV- LAS?

ASSISTANT: Sure, please provide your return date.

USER: I intend to return on 04/12.

ASSISTANT: Can you please share your destination code?

USER: I want to head to Washington, DC - DCA.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: There is no flight found matching with your requirements.

USER: Not an issue, thank you.

ASSISTANT: Thanks for availing us.