You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you at this moment?

USER: I have to go New York city to attend a function to meet my friend so please help me with flight ticket booking from Washington.

ASSISTANT: Sure, could I have your travel dates, please?

USER: Thank you. I have planned my travel dates as Feb 28 and Mar 01.

ASSISTANT: Can you please share your take off and landing airport codes?

USER: Sure, I would like to travel from DCA to LGA.

ASSISTANT: Do you have any airline preference?

USER: I would prefer normal cost airlines so please make sure that.

ASSISTANT: May I know your connection limit?

USER: I am looking for single connecting flight so please check for that.

ASSISTANT: Is there any other preferences?

USER: No, I am ok with any class.

ASSISTANT: May I know your good name?

USER: Sure, myself Frank Roberts.

ASSISTANT: Sorry, there are no flights available from your source.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for opting us, hope to serve you again.

USER: Most welcome.