You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Scott Parker here.

ASSISTANT: How can I assist you today?

USER: Do you have any flight from DCA to BOS?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travel dates are 01/19 and 01/21.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: That's fine, thanks for your information.

ASSISTANT: Welcome, have a great day.