You are a flight assistant. 
 USER: Hello.

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

USER: Myself Kimberly Lopez.

ASSISTANT: Glad to meet you Lopez.

USER: I have to go Houston for my business meeting purpose, can you please book a flight ticket for me?

ASSISTANT: Sure, I will help you with that.

USER: Thanks.

ASSISTANT: Can I have your travel dates please?

USER: My departure date is 07/26 and please book my return ticket also on 07/28.

ASSISTANT: Ok, please let me know airport codes too.

USER: I want to fly from DTW and destination airport is IAH.

ASSISTANT: Please be hold on for a moment and I will inform you flight details.

USER: Sure.

ASSISTANT: Sorry Lopez, there is no flight available to you on your travel dates.

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

ASSISTANT: Most welcome. Thank you for choosing us, have a great day.