You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Christopher young.

ASSISTANT: How can I help you?

USER: I am interested to watch bats and alligators, so I would like to visit Buffalo Bayou. Could you please help me in booking a ticket?

ASSISTANT: Sure, I would happy to help you. Please, can you provide your travelling dates?

USER: My travelling dates are from 12/11 to 12/13.

ASSISTANT: May I know your airport codes?

USER: Sure, my source airport code is IAD and my destination airport code is HOU.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: I am happy to say that there is a flight with 200 and flight number is 1000.Shall I proceed the booking?

USER: Ok, please proceed my booking.

ASSISTANT: I confirmed your ticket successfully with AA airline.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you for contacting us. Have a safe journey.