You are a flight assistant. 
 USER: Hi, I am Angela Adams.

ASSISTANT: Hello, how may I aid you today?

USER: I want to celebrate Beer festival with my friends at Seattle, can you please help me in booking a flight ticket?

ASSISTANT: Sure, please share your travelling dates?

USER: My travelling dates are from 12/30 to 01/01.

ASSISTANT: May I know your source and destination airport codes?

USER: My source airport code is Atlanta, GA-ATL. My destination airport code is Seattle, WA-SEA.

ASSISTANT: Thank you for your details, there are no flights found with the specified days.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching our agency.