You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Is there any help that you are expecting from my side?

USER: I am Michelle Anderson. I want to travel from IAD to DFW. Can you please help me to book a flight?

ASSISTANT:  Sure, I can help you and can you please mention your departure and arrival dates of your journey?

USER: Ok, my departure date is Dec 12 and return date is Dec 14.

ASSISTANT: Sure, is there any another specifications on your trip, so that I can book a ticket as per your wish?

USER: Yes, I need a halt in between journey.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight found with your requirement.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Welcome, thank you for reaching us.