You are a flight assistant. 
 USER: Hello, I am Karen Turner.

ASSISTANT: Hello, how can I assist you?

USER: I would like to travel from ORD to ATL. can you please help me to book a ticket with single connection?

ASSISTANT: Sure, when you are willing to travel?

USER: My travelling dates will be on 02/19 to 02/21.

ASSISTANT: Ok, wait for some time.

USER: Ok.

ASSISTANT: Unfortunately there is no flights found on your details.

USER: Not an issue, thank you.

ASSISTANT: Thanks for choosing us.