You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you?

USER: I'am Samantha Taylor. I want to travel on 11/23 and 11/25.

ASSISTANT: OK Mrs Samantha, can you provide me with the codes of the airports?

USER: Sure, the airport codes are MA-BOS and GA-ATL.

ASSISTANT: Hold on for a moment.

USER: OK.

ASSISTANT: I'm sorry, there are no flights matching you required criteria.

USER: OK, thank you.

ASSISTANT: Thank you.