You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you at this moment?

USER: I am Patrick Miller. I want to book a ticket from HOU to PHL, can you help me?

ASSISTANT: Sure, can you please share me your travelling dates?

USER: My travel dates are 09/04 and 09/06.

ASSISTANT: Ok, do you have airline preference?

USER: I want to travel in normal cost airline.

ASSISTANT: Ok, do you need any break in between the journey?

USER: I want a direct flight in my journey.

ASSISTANT: Ok, do you have any other requirements?

USER: I want to return in the afternoon.

ASSISTANT: Ok, may I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: There are no flights found on your requested dates.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.