You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be at your service?

USER: I am Andrew Mitchell. I want to book a flight ticket on 07/23 and return on 07/25, so can you help me with booking please?

ASSISTANT: Sure, do you need a lay by?

USER: Yes, I need a lay by.

ASSISTANT: Kindly mention your airport codes.

USER: Sure, my airport codes are CO-DEN and MA-BOS.

ASSISTANT: How much amount can you pay for your ticket?

USER: I can pay up to 5000.

ASSISTANT: Frontier airline with flight number 1029 is going on your route and the airfare is 300. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.