You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Catherine Perez. I am looking to book a flight ticket to meet my friend in Las Vegas. Can you help me for booking a flight ticket from DFW to LAS?

ASSISTANT: Sure, kindly share your travel dates.

USER: My travelling dates are Aug 14 and Aug 16.

ASSISTANT: Do you have any connection preference?

USER: I need a single connecting flight.

ASSISTANT: Is there any other specification?

USER: My return time is evening.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's ok, thank you for checking.

ASSISTANT: Thanks for reaching us.