You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Barbara Garcia here.

ASSISTANT: How can I aid you today?

USER: I would like to visit Chicago for a business conference, can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, I will help you in booking flight ticket.

USER: Thank you.

ASSISTANT: Can you please mention your travel dates for booking flight ticket?

USER: Sure, I am planning to move on 11/08 and please book my return ticket on 11/10.

ASSISTANT: May I know your preferable airport code names?

USER: Sure, my nearest genesis airport code is SEA to and my destination airport code is ORD.

ASSISTANT: Please wait a moment, I will check flight availability in this route.

USER: Ok, take your time but try to bring a best flight in my route.

ASSISTANT: Sorry for the inconvenience no flights available in this route as per your requested dates.

USER: Oh! So sad to hear. Anyway, I will choose another alternative to go there. Thank you for the information.

ASSISTANT: You are welcome.