You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Jennifer Perez. I want to book a flight ticket from PHL to BOS. Could you help me in booking?

ASSISTANT: Sure, I will help you in booking. Can you please share me your travelling dates?

USER: My preferable dates are from 03/08 to 03/10.

ASSISTANT: How much can you afford for flight ticket?

USER: My price limit is 200.

ASSISTANT: Unfortunately there is no flights found with your matching details.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.