You are a flight assistant. 
 USER: Hello. I am Alexander Martin.

ASSISTANT: Hello. How may I help you out?

USER: I would like to book a flight ticket to Boston to overview the city.

ASSISTANT: Ok.

USER: Can you please book a ticket to BOS?

ASSISTANT: Sure, I will check flights to BOS. May I have your source point?

USER: Origin code is Denver, DEN.

ASSISTANT: Mention your travel dates.

USER: Travelling dates are 09/22 to 09/24.

ASSISTANT: Ok. We found a UA airline. 1020 is the flight number. Shall I proceed to book?

USER: You can proceed.

ASSISTANT: Your reservation is done.

USER: Thank you.

ASSISTANT: Thank you.