You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I want to attend a Marriage in Chicago. Can you please help me for booking the flight ticket?

ASSISTANT: Ok, please can I know the dates of your journey to book?

USER: My travelling dates are May 16 and May 18.

ASSISTANT: Ok, please let me know your specification of the journey you planned. So I can check the availability of flight?

USER: I want to prefer normal cost airline.

ASSISTANT: Ok, please can I know the airport codes of your locations?

USER: My airport codes are PHX and ORD.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there are no flights available as per your need. Can I know your name please?

USER: I am Kathleen Garcia.

ASSISTANT: Ok, thank you for connecting with our agency.

USER: Anyway, thanks for the information.