You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am planning to meet my friends in Chicago, can you reserve flight ticket from SEA and ORD?

ASSISTANT: Sure, I am here to help you. Can you please help me by providing your journey dates?

USER: My planned travelling dates are Sept,26 and Sept,28.

ASSISTANT: Ok, do you have any concern about the connections in between your journey?

USER: I prefer single connecting flight.

ASSISTANT: Ok, what is your name?

USER: Myself Patrick Davis.

ASSISTANT: Sorry to intimate you that, there are no flights available in this route on the dates you have given.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey. Thank you for the information.

ASSISTANT: You are welcome. Thank you for choosing us.