You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I would like to book a business class ticket from IL to attend a business meeting in DC, can you help me to book a flight ticket with single connection?

ASSISTANT: Sure, I am help you for this. Can you please share me your trip dates?

USER: Sure, I intend to start on 08/09 and the return date will be on 08/11.

ASSISTANT: Could you please share me your airport codes?

USER: My source and destination airport codes are ORD and DCA.

ASSISTANT: May I know your name please?

USER: I am Laura Evans.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry for inconvenience, no flights are found with your specifications.

USER: That's fine, not an issue.

ASSISTANT: Thank you very much for approaching our agency.

USER: Thank you for your information.