You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I have to attend a business meeting in Chicago, can you please book a flight ticket for me?

ASSISTANT: Sure, I am ready to help you with that.

USER: Thanks.

ASSISTANT: Please provide me airport codes of your journey locations.

USER: I would like to take off from LGA airport and destination airport is ORD.

ASSISTANT: Ok, please share your travelling dates also to find a flight for you.

USER: My departure date is 07/20 and please book my return ticket also on 07/22.

ASSISTANT: Ok, please wait a moment and I will get the flight details if they available to you.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry to inform you that no flight is available to you on your dates.

USER: It's ok no problem, I will go with another airline.

ASSISTANT: May I know your good name for documentation purpose?

USER: Sure, my name is Stephanie Edwards.

ASSISTANT: Ok Edwards, thank you for choosing us.

USER: Thank you for your information.

ASSISTANT: Most welcome.