You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Jeffrey Smith. Can you help me booking a flight ticket from LGA to LAS?

ASSISTANT: Yes, I will definitely try my best to help you in booking your flight ticket. Could you please provide your planned dates of journey?

USER: I will start on Feb, 23 and return on Feb, 25.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any connection limit?

USER: I need a break in my journey.

ASSISTANT: Do you have any other specifications on your trip?

USER: I need to start in the evening time.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

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

USER: No problem, thank you for the information.

ASSISTANT: Thanks for reaching us.