You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: My name is Sarah Carter. Can you help me to book a flight ticket from my source airport LGA to DCA?

ASSISTANT: Sure, we are happy to assist you in booking.

USER: Ok, thank you for the positive response.

ASSISTANT: Could you please let me know if you need a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Please let me know your planned travelling dates to proceed further.

USER: I had planned my journey for the date Nov 20 and return date is 22.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: Yes, I need a flight which depart during afternoon.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: No, nothing else.

ASSISTANT: Ok, please wait a moment.

USER: Thank you for asking my intents, please take your own time.

ASSISTANT: Thank you for waiting, sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: That is ok, thank you for the information.

ASSISTANT: Thank you for opting us.