You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you today?

USER: On my name Kevin Lee, please confirm a seat to New York, LGA.

ASSISTANT: Sure, I am ravish to help you.

USER: Thank you.

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

USER: I choose to go with a connecting flight.

ASSISTANT: Kindly, mention your trip dates.

USER: I have doctor appointment on 06/28, so I planned to travel on 06/27. I intend to return on 06/29.

ASSISTANT: To proceed booking I need your origin airport code.

USER: The source place is Philadelphia, PHL.

ASSISTANT: Please, wait for a moment.

USER: Ok.

ASSISTANT: Thank you for being patience.

USER: It's Ok.

ASSISTANT: I am here to inform you that, there is no connecting flight availble with your given requirements.

USER: Ok, I will go with other alternative. Thanks for sharing the information.

ASSISTANT: Thank you for picking us.