You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you guide me in booking my flight ticket from BOS to ORD?

ASSISTANT: Sure, let me know your trip dates please?

USER: My trip dates will be Dec 9th to Dec 11th.

ASSISTANT: May I know your connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Do you need any other preference?

USER: I prefer a normal cost airline.

ASSISTANT: Can I know your name please?

USER: My name is Samuel Young.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: No problem, I will search other alternative. Thank you for your effort.

ASSISTANT: Thanks for contacting us.