You are a flight assistant. 
 USER: Hello. I am Robert Davis.

ASSISTANT: Hello, how can I help you?

USER: I am planning to meet my childhood friend's in New York, could you help me in booking a flight ticket?

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to fly on 09/03 and return date on 09/05.

ASSISTANT: Do you have any specifications?

USER: My price limit is 5000.

ASSISTANT: To confirm your booking, please mention me your airport codes?

USER: My source from Philadelphia, PA - PHL and destination is NY - LGA.

ASSISTANT: OK, please wait for few minutes.

USER: Sure, I need a direct flight.

ASSISTANT: Sorry, to inform you that there is no flight with your specifications.

USER: Not an issue. Thank you for your service.

ASSISTANT: Thank you for reaching us.