You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I would like to enjoy this weekend at Korean war veterans memorial which is held at Washington DC-IAD, so can you please help me out with booking?

ASSISTANT: Sure, can you please share your source point?

USER: My source is from Philadelphia, PA-PHL.

ASSISTANT: May I know your preferred dates of travelling?

USER: My preferred dates of travelling are 01/12 and 01/14.

ASSISTANT: May I know your connection limit?

USER: I need a layover in between my journey.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any flights matching your credentials.

USER: Not an issue, thank you for the information.

ASSISTANT: For documentation purpose, may I know your name please?

USER: My name is Samantha Williams.

ASSISTANT: Thank you for reaching us. Have a good day.