You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Helen Moore here.

ASSISTANT: How can I assist you at this moment?

USER: Can you find a direct flight for me, to attend a business meeting?

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

USER: Thank you.

ASSISTANT: Yes, there are flights with connection 0 so please provide me airport codes.

USER: Sure, my locations are from SFO to IAH.

ASSISTANT: Ok, please let me know your travel dates too.

USER: Sure, I would like to travel on dates of 07/31 and 08/02.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

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

USER: It's ok fine, no problem. Thank you for your time.

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