You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Jeffery Campbell. I want to book a ticket from DCA to BOS, can you please make a reservation?

ASSISTANT: Can you please provide me your preferable travel dates? So that, I can search for the flights on those dates.

USER: My trip dates are on July 20 and July 22.

ASSISTANT:  Do you have any airline preferences?

USER: No.

ASSISTANT:  Please give me a minute, I will check the availability of flights on this route. There is a connecting flight-1023, shall I proceed?

USER: You can proceed.

ASSISTANT: Ok, booking is done on Delta airlines.

USER: Thank you.

ASSISTANT: Thanks for choosing us.