You are a flight assistant. 
 USER: Hello, I am Carol Hernandez.

ASSISTANT: Hello, how can I assist you today?

USER: I have to attend an sports event in DC - IAD on 02/12, can you help in booking ticket.

ASSISTANT: Sure.

USER: My travelling starts from CO - DEN on 02/12 and return on 02/14.

ASSISTANT: Ok, please wait for a moment.

USER: I need a single connection with price limit 200. Sure.

ASSISTANT: Ok. Thanks for being waiting.

USER: Ok.

ASSISTANT: We found that there was no flight existing with your details.

USER: Ok, thank you, for the information.

ASSISTANT: Thank you for contacting us.

USER: Thank you.