You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is John Gonzalez.

ASSISTANT: How can I assist you?

USER: I would like to visit Space Center at Houston. Can you help me in booking a ticket from ORD to HOU?

ASSISTANT: Sure, I'll help you with that. May I know your travel dates please?

USER: My preferred journey dates are 12/09 and 12/11.

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

USER: Please book the ticket.

ASSISTANT: Your ticket has been booked with flight-1022, have a safe journey.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.