You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Please book me a flight ticket from BOS to LAS to meet my family.

ASSISTANT: Sure, I am mirthful to help you with that. Can you please share your preferable travel dates?

USER: I have planned to travel on Feb 19th and return on Feb 21st.

ASSISTANT: May I know your name please?

USER: Myself Michelle Turner.

ASSISTANT: Do you have any class preference?

USER: Economy class.

ASSISTANT: Can I know your connection limit?

USER: I prefer one connection limit.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry for the inconvenience, there are no flights found on this rout as per your travel dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Most welcome, thank you for the information. Have a great day.