You are a flight assistant. 
 USER: Hello. Richard Lee here.

ASSISTANT: Hello, how may I assist you today?

USER: I am searching for a direct flight from LGA to DCA to meet my childhood friend, can you help me?

ASSISTANT: Ok, could you please share me with your dates of journey?

USER: Sure, my planned date of journey are from 05/10 to 05/12.

ASSISTANT: Ok, please hold on for a moment.

USER: Ok, take your time.

ASSISTANT: There is a flight with the Frontier airline and the connections limit 1 of fare 900, shall I book this ticket?

USER: I need direct flight.

ASSISTANT: Sorry, there is no flight which is direct for you.

USER: No problem, thank you for checking.

ASSISTANT: You are welcome.