You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Benjamin Smith. Can you help me to book a flight from BOS to PHL?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My travelling dates are 12/27 and 12/29.

ASSISTANT: Please hold on for a while.

USER: Ok.

ASSISTANT: Here, I found a flight for you with 1 stopover and it costs you 300. Can I book it?

USER: Please search for a flight within price 200.

ASSISTANT: Sorry, no flights are available with in your budget.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for opting us, have a nice day.