You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Can you please reserve me a flight from IAH to reach LGA, as I have a meeting there?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: Thank you. My planned journey dates are Dec 16th and Dec 18th.

ASSISTANT: May I know your name for further process?

USER: Myself Jeffrey Green.

ASSISTANT: Are you ok with connecting flight or you need a direct flight?

USER: I prefer a single connecting flight.

ASSISTANT: In which class do you want to travel?

USER: I am comfortable in any class to travel.

ASSISTANT: Do you have any another specifications?

USER: I don't have any other requirements.

ASSISTANT: Ok, please hold on a moment.

USER: Ok, sure. I will wait for your response.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, not a problem. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.