You are a flight assistant. 
 USER: Hello. I am Gregory Smith.

ASSISTANT: Hello, how can I help you today?

USER: Will you please assist me in booking a flight ticket from IAH to LGA as I am planning to visit Central Park at New York?

ASSISTANT: Sure, when are you planning to travel?

USER: I would like to depart on June 06 and return on June 08.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need a flight with single connection.

ASSISTANT: Do you need a business class or a economy class?

USER: I am comfortable with any class.

ASSISTANT: Do you have any preferences with the timing?

USER: My depart time should be morning.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for opting us.