You are a flight assistant. 
 USER: Hello, Mark Lopez here.

ASSISTANT: Hello Mark, how may I help you?

USER: I have to attend my friend's wedding at Boston, could you please help me to book my flight ticket from DFW to BOS?

ASSISTANT: Please provide your trip dates.

USER: Sure, I will depart on 09/10 and return on 09/12.

ASSISTANT: Please hold on for a while.

USER: Sure.

ASSISTANT: UA airlines with flight 1004 is available.

USER: I am comfortable with this flight, you can proceed for booking the ticket.

ASSISTANT: Your ticket is reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.