You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: Can you please help me in flight ticket booking process from SEA to LGA?

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: Thank you for your response, I want to take off on Apr 18 and book my return ticket also on Apr 20.

ASSISTANT: Do you have any connection limit preference?

USER: I will prefer 1 break in between my journey.

ASSISTANT: Do you have any other specifications for this trip?

USER: I would like to depart in evening time.

ASSISTANT: May I know your name to proceed further?

USER: Sure, my name is Stephanie Turner.

ASSISTANT: Stephanie Turner, there are no flight services available on this route on your provided dates.

USER: Oh! it's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.