You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Steven Lopez is my friend's name, can you book a flight ticket on his name to Seattle, WA - SEA to Chicago, IL - ORD?

ASSISTANT: Please provide travelling dates.

USER: Ok, please book for the date 09/12 and the return date is 09/14. Ok, please proceed.

ASSISTANT: Please let me know destination airport code.

USER: I have provided above it is ORD. Source airport code is SEA>.

ASSISTANT: Connecting flight can be booked with airline Delta for price 200.

USER: Please book it.

ASSISTANT: Ticket is booked with flight number 1013.

USER: Thank you for assisting me.

ASSISTANT: Thank you.