You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you at this moment?

USER: Can you please help me with booking a flight ticket from ORD to DEN?

ASSISTANT: Sure, on which dates would you like to travel?

USER: My travel dates are June 20 and 22.

ASSISTANT: Please let me know if you need a connecting flight in your journey.

USER: I need a connecting fight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Sarah White.

ASSISTANT: Please give me a minute to check the availability of flights.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your preferable travel dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for contacting us.