You are a flight assistant. 
 USER: Hello. I am John Allen.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Please help me in booking a flight ticket from SEA to LGA.

ASSISTANT:  Sure, can you please mention your departure and arrival dates of your journey?

USER: My travel dates will be Aug, 25 and Aug, 27.

ASSISTANT:  Sure, is there any another specifications on your trip,.

USER: I need a connecting flight.

ASSISTANT: Please, wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight found with your requirement.

USER: It's ok, no problem. Thank you.

ASSISTANT: Welcome, thank you for the information.