You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Barbara Garcia.

ASSISTANT: How can I assist you?

USER: I need to book a flight ticket to DEN from MCO in the month of October. Can you please help me out?

ASSISTANT: Please mention your trip dates?

USER: Thank you for considering my request. My travelling dates are 10/18 and 10/20.

ASSISTANT: Sorry, no flights found on your preferable dates.

USER: Not an issue, anyway thank you for the help.

ASSISTANT: Thank you for reaching us.