You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I help you today?

USER: Please book a ticket from Boston, MA-BOS to Charlotte, NC-CLT.

ASSISTANT: Sure, can you please share your trip dates?

USER: Departure is on 02/19 and 02/21 is my return date.

ASSISTANT: May I know your good name please?

USER: I am Melissa Brown.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flights found on your given details.

USER: Thanks for the help.