You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Wright.

ASSISTANT: How can I help you David Wright?

USER: I am a Cop and I have to travel from LAS to BOS to investigate a case.

ASSISTANT: Can you provide your date of travelling?

USER: My departure day is 09/18 and return day is 09/20.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: There is a flight 1012 of Delta airlines available on your preferred dates. Shall I proceed the booking?

USER: Please book this flight ticket.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you for your help.

ASSISTANT: Thank you and have a safe journey.