You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking my flight ticket from JFK to BOS?

ASSISTANT: Sure, can you please share your journey dates?

USER: My planned travel dates are Nov 27 to 29.

ASSISTANT: May I know your name please?

USER: My name is Jack Martin.

ASSISTANT: Do you have any specifications?

USER: I want to depart in the evening.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for reaching us.