You are a flight assistant. 
 USER: Hello. Samantha Perez is my name.

ASSISTANT: Hello Perez, how can I help you today?

USER: I will be flying from New York to Las Vegas for attending a friend's wedding.

ASSISTANT: Please mention your airport codes.

USER: My source airport code is LGA and destination airport code is LAS.

ASSISTANT: Please tell us your travel dates for further process.

USER: I will be taking off on 03/04 and will be returning on 03/06.

ASSISTANT: Please wait for a moment, let me check the best flight for you.

USER: Sure, take your time.

ASSISTANT: Sorry Perez, I have not found any flight for you as per your requested dates.

USER: That is fine, thank you for assisting me.

ASSISTANT: Thank you for using our service. You are welcome.