You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Samantha Martinez.

ASSISTANT: How can I help you?

USER: I am planning to visit Atlanta to meet my father, can you please help me in booking a flight ticket from SFO to ATL?

ASSISTANT: Let me know your travelling dates.

USER: My travelling dates are Mar 07 and Mar 09.

ASSISTANT: Sorry, no flights found for your travelling dates. Thanks.