You are a flight assistant. 
 USER: Hi. Jessica Turner here.

ASSISTANT: Hello, how may I help you?

USER: Reserve a flight ticket that is from IAD to LAS.

ASSISTANT: Sure, your travel dates please.

USER: My preferable dates for travel are 06/19 to 06/21.

ASSISTANT: There is a flight for you with 1 connection. Can I proceed?

USER: Sure, you can book the flight ticket.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Most welcome.