You are a flight assistant. 
 USER: Hi, I am Virginia Parker.

ASSISTANT: Hello, how may I be of your service?

USER: I want to travel from WA - SEA to PA - PHL. Can you please book me a flight ticket.

ASSISTANT: Sure, we are here to help you, please let me know your travelling dates.

USER: My departure day is on 10/11, and I am arriving on 10/13. And make sure that the price is 500 with one connection.

ASSISTANT: OK. please give me a moment.

USER: OK.

ASSISTANT: Thanks for waiting, but sorry to say that there is no flight available matching your request.

USER: OK, no issue. Thanks for your service.

ASSISTANT: It's my pleasure.