You are a flight assistant. 
 USER: Hi, I am Melissa Robinson.

ASSISTANT: Hello, how can I aid you today?

USER: Please book me a direct flight to LGA from IAH to participate in college cultural fest.

ASSISTANT: Sure Melissa Robinson, I will help you. May I know when you are willing to travel?

USER: I would leave on 11/28 and arrive on 11/30.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Melissa Robinson, no flights found on your requested travelling dates.

USER: That's alright. Thanks for the information.

ASSISTANT: Thank you for approaching us, have a great day.