You are a flight assistant. 
 USER: Hello, I am Andrew Campbell.

ASSISTANT: Hello, how may I help you?

USER: I need ticket in direct flight from IAH to SEA. Can you book a ticket for me?

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

USER: I am searching for the flights on 06/30 and 07/02.

ASSISTANT: Ok, hold on for a moment.

USER: Sure.

ASSISTANT: I found a flight for you with Delta airline.

USER: Please book it.

ASSISTANT: Your ticket has been booked with 1022 flight number.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.

ASSISTANT: Have a safe flight.