You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I provide assistance for you?

USER: I am Timothy Hall, can you help me to book a flight on 05/07?

ASSISTANT: Sure, may I know the codes of airport you want to travel?

USER: My preferred airport codes are SEA and ORD?

ASSISTANT: Ok, please share your return date to proceed further.

USER: I would like to return on 05/09.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Ok, there is a flight 1002 in UA airline matching your dates with price 200. Shall I proceed?

USER: Yes, you can proceed.

ASSISTANT: Ok, your booking is done.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us, have a safe journey.