You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I am Amanda Nelson from Chicago. I have to go Houston next week, can you please book a flight ticket for me?

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: Thank you. I want to take off on 09/17 and book my return ticket also on 09/19.

ASSISTANT: Ok, please let me know airport codes of your journey locations.

USER: I would like to fly from ORD and destination airport is IAH.

ASSISTANT: Please wait a moment to check flight availability.

USER: Ok.

ASSISTANT: Sorry Amanda Nelson, no flight is available to you on your dates.

USER: Oh! It's ok no problem, I will go with another airline service. Thank you for your service.

ASSISTANT: Thank you for choosing us, have a good day.