You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am looking for a flight from IAH to EWR, can you help me over that?

ASSISTANT: May I know your trip dates?

USER: Ok, my planned dates are from Aug 19 to 21.

ASSISTANT: Do you prefer any specifications?

USER: I would like to return in the afternoon time with single connection.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: It's ok, thanks for checking.

ASSISTANT: May I know your name?

USER: Sure, I am Paul Garcia.

ASSISTANT: Thank you.

USER: Welcome.