You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I want to attend a conference in Chicago, can you help me in booking a ticket?

ASSISTANT: Sure, may I know your travelling date please?

USER: My travel dates are 06/16 and 06/18.

ASSISTANT: Please provide me your airport codes please?

USER: I want to fly from SEA to ORD.

ASSISTANT: May I know your good name please?

USER: Myself Samuel Evans.

ASSISTANT: Thank you Samuel, unfortunately there is no flight on your details.

USER: No problem, I will search for another way to complete my trip.

ASSISTANT: Thank you so much for choosing us.

USER: Welcome.