You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: Myself John Anderson. 01/20 is the Inauguration Day, on this day I want to meet my childhood friends. Could you help me in making a reservation on the return date of 01/22?

ASSISTANT: Sure, May I know the journey codes?

USER: I have to fly from San Francisco, SFO to reach the Atlanta, ATL.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No worries at all. Thank you for your service.

ASSISTANT: Thank you for opting us.