You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Emily Smith. I am planning to conduct a free medical camp in Denver, CO - DEN, so help me in booking a flight ticket from Dallas & Fort Worth, TX - DFW.

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates?

USER: I will start on 07/06, return on 07/08.

ASSISTANT: Do you need any halts in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there is no flights found on your requested details.

USER: No problem, thanks for your service.

ASSISTANT: Thanks for approaching us.