You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: My name is Melissa Lopez. I would like to travel from LAS to DCA.

ASSISTANT: Ok, may I know your planned travel dates please?

USER: My preferable dates are from 05/26 to 05/28.

ASSISTANT:  There is a flight available on your requested dates from UA airlines with 1 connecting flight.

USER: Please proceed with the booking.

ASSISTANT: Your ticket is booked with flight 1003.

USER: Thank you for your help.

ASSISTANT: You are most welcome.