You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I want to book a flight ticket from BOS to LAX. Could you help me in booking?

ASSISTANT: Sure, May I know the journey dates?

USER: My travelling dates are from Oct 22 - 24.

ASSISTANT: Do you have any connection limit?

USER: I prefer for connecting flight.

ASSISTANT: Is there any other requirements?

USER: I need economy class.

ASSISTANT: May I know your name?

USER: Melissa Jones.

ASSISTANT: Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.