You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Edward Walker here, can you please check for the flights with economy  class for my journey.

ASSISTANT: Sure, may I know your trip dates please?

USER: My travel dates are from Jan 16 to Jan 18.

ASSISTANT: Can I know your airport codes please?

USER: My airport codes are from LGA and IAH.

ASSISTANT: Do you have any other requirements?

USER: My depart time is in evening and return time is in morning.

ASSISTANT: Please wait for a while.

USER: I need 1 connection flight.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: Oh! That's sad to know. Anyways, thank you for checking.

ASSISTANT: My pleasure.