You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Elizabeth Thomas.

ASSISTANT: How can I aid you?

USER: I am planning to attend music concert at DCA, can you please help me with booking a flight ticket from PHL?

ASSISTANT: Sure, please provide me your travel dates.

USER: Sure, I would like to take off on May 27 and return on May 29.

ASSISTANT: Do you have any specifications?

USER: I would like to depart during evening time and return during morning time. I need a direct flight.

ASSISTANT: Ok, be on hold for a moment.

USER: Sure, take your time.

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

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.

USER: You are welcome.