You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to book a flight ticket from PHL to HOU, cna you help me with that.

ASSISTANT: Sure. May I know your trip dates?

USER: My travel dates are 01/25 and 01/27.

ASSISTANT: Do you have any other requirements?

USER: I need a direct flight.

ASSISTANT: May I know your name?

USER: I am Raymond Evans, and I prefer economy class.

ASSISTANT: Sorry, there is no direct flight available.

USER: That's ok. Thank you for your service.

ASSISTANT: Most welcome.