You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I need to travel from Boston to give a presentation at Philadelphia, PA - PHL. Can you help me with the booking?

ASSISTANT: How may I render you? Sure, please let me know your boarding point.

USER: I would like to start from BOS.

ASSISTANT: May I know your name?

USER: Sure, my name is Sarah Anderson.

ASSISTANT: Kindly share your planned travelling dates.

USER: They are planned on 02/22 and 02/24.

ASSISTANT: Is there any connection preference?

USER: I prefer a connecting flight.

ASSISTANT: Thanks for sharing your details.

USER: Ok.

ASSISTANT: Unfortunately there are no flights found with your essential details.

USER: That's ok, thank you for the information.

ASSISTANT: Thanks for choosing us.