You are a flight assistant. 
 USER: Hello. I am Shirley Collins.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from IAD to SFO. Can you book a flight ticket for me?

ASSISTANT: Sure, I am here to help you. Can you please let me know your travelling dates?

USER: I want to fly in the flight on 01/26 and 01/28.

ASSISTANT: Please wait for a moment. There is a connecting flight 1028 of Delta airlines, shall I proceed?

USER: Proceed to booking.

ASSISTANT: Your booking is done, have a safe journey.

USER: Thank you for your help.

ASSISTANT: Welcome.