You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to go to Brooklyn Bridge which is one of the oldest roadway bridges in the United States. So please help me to book a flight ticket from LAX to LGA.

ASSISTANT: Sure, can I know your travel dates?

USER: My travelling dates 01/12 and 01/14.

ASSISTANT: Give me a minute, let me check the details.

USER: Sure.

ASSISTANT: Can I know your name?

USER: My name is Mary Allen.

ASSISTANT: Sorry Allen, there are no flights available on your requested dates.

USER: It's ok, thank you for checking.

ASSISTANT: You are welcome.