You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Please book a ticket on the name of Brian Edwards to Boston, BOS to meet my sister.

ASSISTANT: Sure, I am happy to aid you in flight ticket booking process. Can you please let me know your preferable travel dates for booking flight ticket?

USER: My travelling dates are Jan 27 and Jan 29.

ASSISTANT: May I know your current location?

USER: My source is Austin, AUS.

ASSISTANT: Do you have any particular time for departing and returning?

USER: My depart time is morning.

ASSISTANT:  Is there any another specifications on your trip, so that I can arrange like that only.

USER: I want a direct flight.

ASSISTANT: Sorry to say, there is no flight for you on your route.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for contacting us.