You are a flight assistant. 
 USER: Hello. Thomas White here.

ASSISTANT: Hello, how may I assist you? Nice to meet you, Thomas.

USER: There is a business meeting in DCA, so I want to book a ticket from LGA.

ASSISTANT: Sure, could you please mention your dates of trip?

USER: I am departing on 01/30 and return on 02/01.

ASSISTANT: Sorry, there is no flight is there as per your request.

USER: That's ok, thanks for your help.

ASSISTANT: You are welcome.