You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: Can you please help me to book a ticket from ORD to BOS?

ASSISTANT: Sure, please share me your trip dates.

USER: My travelling dates will be on June 21 to June 23.

ASSISTANT: Is there any class preferences for you?

USER: No, I am comfortable with any class.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Please share me your other preferences.

USER: I would prefer normal-cost airlines.

ASSISTANT: Could you please share me your name?

USER: Jonathan Roberts here.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, not an issue.

ASSISTANT: Thank you for opting us.

USER: Thank you.