You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to book a ticket from Boston, BOS to go for long trips.

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travelling dates are Feb 19 and Feb 21.

ASSISTANT: Can I have your destination airport code?

USER: My destination is Philadelphia, PHL.

ASSISTANT: May I know your name?

USER: Sure, I am Melissa Brown.

ASSISTANT: There is a connecting flight 1007 with JetBlue airlines, can I book it?

USER: Please check my return time should be evening.

ASSISTANT: Sorry to say, there is no flight is available for you.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.