You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I need to book a connecting flight from Seattle to attend a business meet at Chicago. Can you help me with it?

ASSISTANT: Sure, I am here to help you. Can I know your travelling dates?

USER: I would like to leave on 06/22 and return on 06/24.

ASSISTANT: Ok, may I know your airport codes?

USER: From SEA, I plan to reach ORD.

ASSISTANT: Ok, In the meanwhile, may I know your name?

USER: Sure, Kevin Nelson is my name.

ASSISTANT: Sorry to say that, there are no flight's available based on travelling dates.

USER: Ok, thank you.

ASSISTANT: Thank you for approaching us.