You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Michael Garcia here.

ASSISTANT: Hello, how may I help you?

USER: My airport codes for boarding the flight are LGA to LAS. Can you reserve a flight ticket to Las Vegas? I am looking for a direct flight.

ASSISTANT: Sure, I am mirthful to help you with that flight ticket booking. Can you please provide your planned travel dates?

USER: My preferable dates for travel are 05/23 to 05/25.

ASSISTANT: Sorry to tell you that, there no no flights available as per your given travel dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching our agency, have a great day.