You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I am Brian Taylor. I need to attend a cultural festival in New York city so please help me with flight ticket booking from Las Vegas.

ASSISTANT: Sure, can you please let me know your journey dates?

USER: Thank you for that. I have planned my travel dates as Feb 25 and Feb 27.

ASSISTANT: May I know your landing airport code?

USER: Sure, I would like to travel from LAS to LGA as these are very much near to my travelling locations.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flights are available on your requested dates.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.