You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to visit White Rock Lake at Dallas with my cousin, please help me in booking a ticket.

ASSISTANT: Sure, I am here to help you out. Please provide me your airport codes.

USER: My origin and destination airport codes are CLT and DFW.

ASSISTANT: Can you please share me your trip dates?

USER: My journey dates are 12/21 and 12/23.

ASSISTANT: May I know your name please?

USER: My name is Emily Anderson.

ASSISTANT: Sorry Emily, here I didn't find any flights in your route.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.