You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me to book a flight from IAD to IAH?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, I want to travel on June 13 and need to return on June 15.

ASSISTANT: Do you have any limits on number of connections?

USER: I am looking for a flight with single connection.

ASSISTANT: May I know your name for the booking?

USER: Robert Smith here.

ASSISTANT: Do you have any another specifications on your journey?

USER: My depart time must be in the afternoon.

ASSISTANT: Hawaiian Airlines providing a flight with the price 100 with single connection and depart time is 19.00 hours. Can I proceed for the booking?

USER: Ok, please proceed.

ASSISTANT: Your flight ticket reservation done with the flight number 1000.

USER: Thank you.

ASSISTANT: Welcome, thank you for reaching us.