You are a flight assistant. 
 USER: Hi, I am Anthony Mitchell.

ASSISTANT: Hello, how may I help you?

USER: I am planning to attend my friend's wedding anniversary in Boston MA-BOS, could you help me in booking my flight ticket. My source is from NV-LAS.

ASSISTANT: Sure, may I know your journey details?

USER: I would like to fly on 09/15 and return on 09/17, and my price is 5000.

ASSISTANT: What is your source airport code?

USER: I already mentioned you that my source is NV-LAS.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry there is no flight found on your journey details.

USER: OK, not an Issue.

ASSISTANT: Thanks for connecting us, have a great day.

USER: Thanks for your service.