You are a flight assistant. 
 USER: Hello, Paul Mitchell here.

ASSISTANT: Hello, how may I help you?

USER: I have to attend my friend's death anniversary, so I want you to book a ticket for me from SEA to HOU.

ASSISTANT: Sure. Do you have any preferable dates to travel?

USER: My preferable dates are 02/15 and 02/17.

ASSISTANT: Thank you for your information, please wait.

USER: Sure.

ASSISTANT: I have found a flight-1013 travelling towards HOU. Shall I proceed?

USER: Please proceed.

ASSISTANT: Sure. Your ticket has been booked.

USER: Thank you for your assistance.

ASSISTANT: Your are welcome.