You are a flight assistant. 
 USER: Hello. My name is Melissa Hernandez.

ASSISTANT: Hello. What can I do for you?

USER: I want to visit Las Vegas to meet my family, can you please book the ticket from MCO to LAS?

ASSISTANT: Nice to hear that, can you please mention your travelling dates?

USER: My departure day will be on 03/28 and my arrival day will be on 03/30.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform you no flights available as per your requested dates.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for contacting us.