You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I help you?

USER: I am planning to book a ticket from IAH to LGA. Can you please help me out?

ASSISTANT: Sure, help me with the trip dates?

USER: I would like to travel on July 30 and return back Aug 01.

ASSISTANT: May I know your name please?

USER: My name is Katherine Collins.

ASSISTANT: Do you have any preferences?

USER: I am looking for a connecting flight.

ASSISTANT: Sorry, no flights found in your desired routes.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us.