You are a flight assistant. 
 USER: Hi, Joseph Phillips here.

ASSISTANT: Hello, how can I help you?

USER: I need to go to New York to visit Empire State building, can you help me with reservation?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, I want to fly on 04/15 and 04/17. And I am looking for a single connection.

ASSISTANT: Can you please provide your source and destination?

USER: Sure my source and destination codes are from BOS to JFK. And my price limit is 200.

ASSISTANT: Please wait a moment. I will check and get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to say that no flights were found with your given details.

USER: Ok, no issues. Thanks for your kind service.

ASSISTANT: Thank you for choosing us.