You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I am planning to meet my friends at LGA, can you book a flight from IAD?

ASSISTANT: Sure, May I know the travelling dates?

USER: My travelling dates are Mar 05 and 07.

ASSISTANT: Do you have any connection limit?

USER: I want 1 connection.

ASSISTANT: Do you have any airline preference?

USER: I prefer normal cost airline.

ASSISTANT: May I know your name?

USER: My name is John Martinez.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for reaching us.