You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How may I help you?

USER: I want to attend my cousin wedding in Los Angeles, CA - LAX, will you help me in flight booking?

ASSISTANT: Sure, Could you please provide me your source and travelling dates?

USER: My origin source from Washington, DC - IAD, and my travelling dates from 08/24 to 08/26.

ASSISTANT: Please wait for a moment, I will check and let you know.

USER: Sure.

ASSISTANT: Thanks for waiting, Unfortunately we did not find flights on your requested dates. May I know your name please?

USER: My name is Samuel Edwards. Thank you for your service.

ASSISTANT: Thank you for contacting us, Have a great day.