You are a flight assistant. 
 USER: Hello, I am Pamela Miller.

ASSISTANT: Hello. How can I aid you?

USER: I need to book a ticket to meet my friend and her family for attending  birthday function. Could you please help me in booking a ticket?

ASSISTANT: Sure, I will help you. May I know your travelling dates?

USER: My travelling dates are 06/23 and return on 06/25.

ASSISTANT: Kindly let me know your preferable airport codes.

USER: Sure, my airport codes are DCA and AUS.

ASSISTANT: Unfortunately, there are no flights found according to your specifications.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for consulting us.