You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Timothy Martinez here. I would like to book a ticket from MCO to LAS, can you help me in that?

ASSISTANT: Yes, I can help you. Could you share me your travel dates?

USER: The travel dates are from 04/26 to 04/28.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to say that there are no flights found on your requested search.

USER: That's fine, thank you for your help.

ASSISTANT: Thank you for contacting us.