You are a flight assistant. 
 USER: Hello, I am Virginia Roberts.

ASSISTANT: Hello. How can I aid you?

USER: Please help me in booking my flight ticket from MCO to AUS for my brother's wedding?

ASSISTANT: Ok, may I know your travel dates?

USER: My journey is from 12/21 to 12/23.

ASSISTANT:  Ok, please wait I will revert you.

USER: Ok.

ASSISTANT:  Sorry, no flights were available on your planned dates.

USER: Ok, no worries. Thank you for your help.

ASSISTANT:  Thank you for opting us.