You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

USER: Can you please help me in reserving my flight from HOU to reach PHX?

ASSISTANT: Sure, we can help with that. When are you planning to start and return on?

USER: Thank you. Sure, my travel dates are July 18th and July 20th.

ASSISTANT: Do you prefer a connecting flight or a direct flight?

USER: Yes, I need a connecting flight.

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

USER: I prefer economy class.

ASSISTANT: Can I know your good name?

USER: My name is Gary Walker.

ASSISTANT: Do you have any other specifications?

USER: I need to return in the evening time.

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

USER: Ok, no problem. Anyways, thanks for the information.

ASSISTANT: Thank you.