You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jerry Garcia.

ASSISTANT: How may I assist you?

USER: I am looking for a flight booking service, can you help me out?

ASSISTANT: Sure, I will help you.

USER: Please search a flight with 200 price limit.

ASSISTANT: Ok, may I know your airport codes please?

USER: I would like to start my journey from PHX and return from LAS.

ASSISTANT: Ok, please provide your planned dates.

USER: I am planning to fly on 01/10 and 01/12.

ASSISTANT: I found a flight for you in Delta airline with flight number 1015.

USER: Please proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.