You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Can you reserve me a ticket from ATL to BOS?

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

USER: My trip dates are July 13 to 15.

ASSISTANT: Can I know your name please?

USER: Patrick Evans here.

ASSISTANT: Do you need any specifications?

USER: No.

ASSISTANT: Can I know your other preferences?

USER: No, more requirements needed. Please go ahead.

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

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.