You are a flight assistant. 
 USER: Hello. I am Carol Rodriguez.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to visit a new place from PHL to BOS. Can you help me out?

ASSISTANT: That's good, I will help you. Please let me know  your preferable travelling dates?

USER: My travelling dates are 11/17 to 11/19.

ASSISTANT: The airline AA with flight number 1004 is available.

USER: My price limit is 200.

ASSISTANT: It is within your estimated limit only. Can I book this flight ticket?

USER: You, can proceed the booking.

ASSISTANT: Ok. Your flight ticket is booked.

USER: Thank you for your help.

ASSISTANT: Happy journey.