You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in booking the flight ticket from LGA to DFW?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: Thank you, my travel dates are Feb 17 and Feb 19.

ASSISTANT: Ok, please mention your name.

USER: My name is Catherine Thomas.

ASSISTANT: Ok, do you have any connection limit?

USER: Yes, I need a single connection flight.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, thank you for the information.

ASSISTANT: Welcome, have a nice day.