You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you book a ticket for me please?

ASSISTANT: Sure, can you provide your basic details?

USER: I want to book a ticket from NY - EWR to CO - DEN. My journey dates are 05/13 & 05/15.

ASSISTANT: Can I know your name please?

USER: My name is William Roberts.

ASSISTANT: Roberts, basing on your details I got a flight with flight number 1015. Can I proceed booking your ticket?

USER: Can I know more details of it?

ASSISTANT: Price and number of connections should be 100 and 0.

USER: I need a flight with single connection.

ASSISTANT: Sorry Roberts, I didn't find flights with 1 connections.

USER: Anyway thank for your patience.

ASSISTANT: your welcome.