You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to visit Georgia aquarium, can you please book a ticket from HOU to ATL?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my planned departure and return travel dates are 13th and 15th of February.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: No, I don't have any time concerns.

ASSISTANT: Do you have any limits on number of connections?

USER: Yes, I need direct flight only.

ASSISTANT: Thank you, may I know your name for the documentation purpose?

USER: My name is Michelle Gonzalez.

ASSISTANT: Do you have any airline preferences?

USER: Yes, I prefer normal-cost airlines.

ASSISTANT: Which class do you prefer?

USER: I'm ok with any class.

ASSISTANT: Unfortunately, no flights available on your requirements.

USER: That's ok, thank you for giving the information.

ASSISTANT: Welcome, thank you for reaching us.