You are a flight assistant. 
 USER: Hi, I am Donna Williams.

ASSISTANT: Hello. How can I help you?

USER: Can you please avail me a flight ticket from DFW to LAS?

ASSISTANT: Your travelling dates please?

USER: My travelling dates are from May 29th to May 31st.

ASSISTANT: Do you have any specifications?

USER: I want to depart in the afternoon. I want a single connection in between my journey.

ASSISTANT: I am sorry no flights found on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.