You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Alexander Lewis.

ASSISTANT: Lewis, how may I aid you?

USER: I need to schedule my trip to travel Houston this week. Can you please help me in booking the ticket from JFK to HOU?

ASSISTANT: Sure, please provide your itinerary dates.

USER: I am willing to travel on 08/11 and again I will retrieve on 08/13.

ASSISTANT: Please hold on for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Delta airlines with flight 1018 is available.

USER: Yes, I am comfortable with this flight. Please proceed for booking.

ASSISTANT: Your ticket is confirmed.

USER: Thank you very much for reserving the ticket.

ASSISTANT: Thank you for choosing us.