You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Katherine Lewis this side, planning to go for a round trip to LGA to visit another branch of my company, can you help me with that?

ASSISTANT: Sure, please tell your origin location?

USER: My origin location is also LGA.

ASSISTANT: Can I have your travelling dates?

USER: Sure, I have to go on 06/01 and return back on 06/03.

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

USER: Ok, then I have to go by another modes of travelling. Any way, thank you for your information.

ASSISTANT: Thank you and have a nice day.