You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: My name is Melissa Brown. I have a business meeting in Chicago, can you help me for booking a flight ticket from BOS to ORD?

ASSISTANT: Definitely, I will aid you in that, can you share me your trip dates?

USER: My travelling dates are July 20 and July 22.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a single connecting flight.

ASSISTANT: Sorry to say this, no flights are available on your desired route.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: Welcome.