You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

USER: Can you please help me to book a flight from LGA to IAH?

ASSISTANT: Sure, please tell me your connection limit?

USER: I am fine with one connecting flight.

ASSISTANT: Ok, may I know when you want to travel?

USER: I will travel on September 6th and 8th.

ASSISTANT: Ok, help me with your class preference.

USER: I prefer economy class.

ASSISTANT: Do you have any other preferences?

USER: I want a direct flight.

ASSISTANT: May I know your good name please?

USER: My name is Sharon Phillips.

ASSISTANT: There are no flights found on your requirements.

USER: No problem, thank your for your help.

ASSISTANT: Thank you for reaching us.