You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jennifer Hernandez here.

ASSISTANT: Hernandez, how can I assist you today?

USER: I want to book a flight ticket from  DCA - BOS to meet my boss, can I help you?

ASSISTANT: Sure, can you please let us know your trip dates?

USER: I will be travelling from 02/28 to 03/01.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights available on your given dates.

USER: Ok, thank you for checking.

ASSISTANT: Thank you for choosing us.