You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to visit the Top of the Rock observation deck which is located in New York, LGA. Can you avail me to book a flight ticket?

ASSISTANT: Sure, May I know the source code?

USER: My source is from Houston, HOU.

ASSISTANT: Please help me with your travelling dates.

USER: My travel dates are Jan 05 and 07.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I prefer to travel in business class.

ASSISTANT: May I know your name?

USER: Emily Perez here.

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

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.