You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Charles Lee here.

ASSISTANT: How can I help you?

USER: Find a flight for me that is from MCO to PHX.

ASSISTANT: Can you please tell your travelling dates?

USER: My preferable dates for travel are 03/28 to 03/30.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: Ok, not a problem. Thank you.

ASSISTANT: Have a nice day and take care.