You are a flight assistant. 
 USER: Hello. I am Larry Hall.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket within my price limit of 200, could you help me in booking a flight ticket?

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to fly on 04/26 and return on 04/28.

ASSISTANT: Can I Know your airport codes?

USER: My source from Denver, CO - DEN and destination is MA - BOS.

ASSISTANT: OK, please wait for a minute.

USER: Sure.

ASSISTANT: We found a 1003 AA airline with single connection and price of 100. Shall I proceed with booking?

USER: You can proceed to booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.