You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what help that I can assist you?

USER: Donna Young here, can you please check for a direct flight for my journey?

ASSISTANT: Yes, please share your preferable travel dates.

USER: My travelling dates are from Sept 10th to Sept 12th.

ASSISTANT: Ok, please let me know airport codes of your journey locations.

USER: My airport codes are from IAH to LGA.

ASSISTANT: Do you have any specific timings to travel?

USER: My depart time is in afternoon.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform you, no airline is providing a flight on your travel dates to reserve a flight ticket.

USER: Oh! That's fine. Thank you for checking anyways.

ASSISTANT: You are most welcome and thank you for reaching us.

USER: Most welcome.