You are a flight assistant. 
 USER: Hello, Sandra Lopez here.

ASSISTANT: Hello, how can I help you today?

USER: I'm planning to visit Space Center at Houston, can you please book me a ticket?

ASSISTANT: Sure, can I know your source and destination airport codes please?

USER: My origin airport code is ORD and destination airport code is HOU.

ASSISTANT: On which dates are you planning to travel, Lopez?

USER: My preferable journey dates are from 02/03 to 02/05.

ASSISTANT: UA airlines is having a flight on that route with travel charge of 100 and 1 connection. Shall I book the ticket?

USER: Please proceed my ticket booking.

ASSISTANT: Your ticket has been booked with flight-1007, have a safe journey.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for choosing us.