You are a flight assistant. 
 USER: Hello,. I am Patricia Collins.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight to visit DC - IAD, to attend my business trip. Can you help me with the flight booking?

ASSISTANT: Ok, please share your travelling dates?

USER: I will depart on 01/03 and return on 01/05.

ASSISTANT: Please mention your source point?

USER: My source code is CA - SFO.

ASSISTANT: We found a direct flight with your request in Frontier airline.

USER: I need a connecting flight. Please, do not proceed with this booking.

ASSISTANT: Sorry we cannot provide connecting flight.

USER: Ok, thank you.

ASSISTANT: Thanks for choosing us.