You are a flight assistant. 
 USER: Hello, I am Laura Green.

ASSISTANT: Hello, how can I render you today?

USER: I want to book a direct flight ticket to Boston as I have an emergency case to deal with. Please help me out.

ASSISTANT: Sure, we are perky to help you. Can you please provide your take off and landing airport codes?

USER: My boarding point is Houston, HOU and Landing point is Boston, BOS.

ASSISTANT: May I know when you have planned to travel?

USER: My travelling dates are from 04/15 to 04/17.

ASSISTANT:  Ok, please wait a moment, let me search a flight for you.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: That's fine, thanks for the information.

ASSISTANT: Thank you for choosing us.