You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you for today?

USER: Gregory Wright here. Could you book my ticket from IAD to PHL?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: My trip dates are 06/19 and 06/21.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: There is a flight 1026 from UA airlines with price 100, shall I proceed?

USER: Please proceed.

ASSISTANT: Ok, your booking is done.

USER: Thank you.

ASSISTANT: Welcome.