You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Donald Harris.

ASSISTANT: How can I assist you?

USER: I want to travel from SFO to ORD for attending a seminar.Could you please help me for booking a ticket? My travelling dates are 08/15 to 08/17.

ASSISTANT: I found a flight with your requirements in UA airlines, it has 1 connection.

USER: If fare is 200 book it.

ASSISTANT: Your ticket is confirmed with 1020 flight number.

USER: Thank you for helping.

ASSISTANT: Thank you for approaching us.