You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Lisa Carter.

ASSISTANT: How may I help you out?

USER: I am planning to travel from SEA to BOS, can you help in booking?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are 09/06 to 09/08.

ASSISTANT: Sorry, there are no flights found in our database.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.