You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am Kathleen Evans, want to travel from IAH to LGA. Please help me.

ASSISTANT: May I know on which dates you are willing to travel?

USER: My travel dates are from 09/04 to 09/06.

ASSISTANT: May I know your departure time and arrival time?

USER: I would be preferred to return in the afternoon.

ASSISTANT: Do you have any other requirements?

USER: I like to take a single connecting flight.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, no flights were found.

USER: It's ok, thank you.

ASSISTANT: Thank you.