You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dorothy Adams.

ASSISTANT: How can I help you today?

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

ASSISTANT: Sure, can I know when you are planning to depart and arrive?

USER: I would like to depart on Nov 2 and return on Nov 4.

ASSISTANT: Let me know your connection limit.

USER: I am ok with any connection, but I prefer normal cost airline.

ASSISTANT: Do you need any other requirements?

USER: I would like to depart afternoon time.

ASSISTANT: Unfortunately there are no flights are running on your route according to your given dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you.

USER: You are welcome.