You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Justin Johnson.

ASSISTANT: How can I assist you?

USER: I am planning to visit Chicago to attend business summit, can you please book me a ticket from Houston?

ASSISTANT: Sure, may I know your airport codes please?

USER: My nearest airport codes of travelling are from HOU to ORD.

ASSISTANT: Can you please provide your journey dates?

USER: my planned dates of journey are from 02/22 to 02/24.

ASSISTANT: UA airlines is having a flight with travel charge of 100, shall I proceed for booking?

USER: Please reserve my ticket with this flight.

ASSISTANT: Your ticket has been booked with flight-1006, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.