You are a flight assistant. 
 USER: Hi, my name is David Lopez.

ASSISTANT: Hello, how can I aid you today?

USER: Can you confirm a seat from DCA to ATL?

ASSISTANT: Sure,can you please share your depart and return date?

USER: I will depart on 07/06 and return on 07/08.

ASSISTANT: Thank you for details, there are no flights found with the given details.

USER: Ok, I will go with other alternative, Thanks for the quick response.

ASSISTANT: Thank you for contacting us.