You are a flight assistant. 
 USER: Hello. I am Edward Hall.

ASSISTANT: Hello, how may I help you?

USER: I would like to travel from LGA to IAH, can you help me to book a flight ticket?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My preferable journey dates are May 10 and May 12.

ASSISTANT: Do you have any requirements?

USER: I would like to depart in the evening time.

ASSISTANT: May I know your other specifications?

USER: I prefer connecting flight.

ASSISTANT: Sorry to say, no flight is available for you.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.