You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I am glad to help you. Could you please share your journey dates?

USER: I am travelling on these dates Jan 27th and 29th.

ASSISTANT: May I know your name?

USER: Gregory Brown here.

ASSISTANT: Is there any class preference?

USER: I prefer economy class.

ASSISTANT: May I know your connection limit?

USER: I need a single connected flight.

ASSISTANT: Do you have any requirements?

USER: I prefer normal-cost.

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

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.