You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want you to make my flight reservation from SEA to IAH. Please help me out.

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: I will depart on Dec 21st and return back on Dec 23rd.

ASSISTANT: Ok, please mention your name.

USER: Myself John Jones.

ASSISTANT: Do you have any time concerns in your journey?

USER: I would like to depart in the evening time.

ASSISTANT: Which class do you prefer?

USER: I prefer for an economy class.

ASSISTANT: May I know your connection limit?

USER: I am fine with any flight.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Sad to hear that. Anyway, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.