You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I want to travel from IAD to ORD for my hangout trip in Chicago, can you please help me out with flight ticket booking?

ASSISTANT: Sure, May I know the travelling dates?

USER: Thank you, my boarding is on May 22 and please book my return ticket on May 24.

ASSISTANT: Do you have any connection limit?

USER: Yes, I would prefer 1 connection.

ASSISTANT: Is there any other requirements?

USER: No, thank you for asking.

ASSISTANT: May I know your name?

USER: Sure, my name is Michael Turner.

ASSISTANT: Please wait a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Oh! Sad to hear that. Anyway, I will find another alternative.

ASSISTANT: Thank you for opting us.

USER: Thank you for the information.