You are a flight assistant. 
 USER: Hello, Anna Phillips here.

ASSISTANT: Hello, how may I help you?

USER: I have planned to celebrate my friend's birthday at Boston, MA - BOS. Can you please book a ticket on 05/19?

ASSISTANT: Sure, we are here to help you. Kindly, mention your origin airport code.

USER: My source point is New York, NY - JFK.

ASSISTANT: Kindly, mention your return date.

USER: I have to return on 05/21.

ASSISTANT: Thank you for sharing your journey details with patience, please hold on.

USER: Sure.

ASSISTANT: No flight found on your journey dates.

USER: Ok, it's not an issue.

ASSISTANT: Thank you, have a nice day.

USER: Thank you for the response.