You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I have a live music concert at Houston, please help me in booking a ticket from HOU to IAH.

ASSISTANT: Sure, can you please share your planned trip dates?

USER: My planned journey dates are on Mar 23 and Mar 25.

ASSISTANT: Do you have any connection limit?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Do you have any class preference?

USER: No, any class is comfortable for me.

ASSISTANT: Do you have any specifications?

USER: I would like to return in the morning.

ASSISTANT: May I know your good name please?

USER: My name is Lisa Lee.

ASSISTANT: Sorry, there are no flights found with your given details.

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

ASSISTANT: Thank you for reaching us.