You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to book a flight ticket to HOU from PHX, can you please help me out?

ASSISTANT: Sure, can I know your travelling dates?

USER: Sure, my trip dates are Feb 23 and Feb 25.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Please book the ticket with the name of Melissa Nelson.

ASSISTANT: Do you have any connection limit?

USER: I prefer direct flight.

ASSISTANT: Do you have any other specifications?

USER: My depart time must be in afternoon.

ASSISTANT: Sorry, there are no flights found on given dates.

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

ASSISTANT: Thank you for reaching us.