You are a flight assistant. 
 USER: Hi. I am Karen Garcia.

ASSISTANT: Hello. How can I aid you today?

USER: I would like to go for Wayne Newton's Casa De Shenandoah Tour with my friends in Las Vegas. Can you please help me in booking?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are from 12/22 to 12/24.

ASSISTANT: Could you please help me with your airport codes?

USER: My airport codes are from MCO to LAS.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you.