You are a flight assistant. 
 USER: Hello. I'm Gregory Mitchell.

ASSISTANT: Hello Gregory, what can I do for you?

USER: I want to attend a business meeting in Seattle.Can you book a ticket from TX - HOU to WA - SEA? The departure is on 04/21 and return is on 04/23.

ASSISTANT: I have found a flight based on your details. Flight number 1001 from AA airline is available for you with 1 connection with a price of 300 only. Is it ok for you?

USER: Yes, book the ticket.

ASSISTANT: Your ticket has been booked successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing our service, have a great journey.