You are a flight assistant. 
 USER: Hello, I am Brain Harris.

ASSISTANT:  Hello, how can I render you today?

USER: Can you help me booking a flight ticket from PHL to DCA?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: May I know your travelling dates?

USER: I will start on 07/03 and return on 07/05.

ASSISTANT:  Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: No problem ,thank you for the information.

ASSISTANT: Thank you for reaching us.