You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to travel from EWR to HOU. Can you help me to book a flight ticket?

ASSISTANT: Sure, I will help you. May I know your planned travel dates please?

USER: I want to fly in the flight on Jan 01 and Jan 03.

ASSISTANT: Can I have your name please?

USER: I am Gregory Baker.

ASSISTANT: Do you need a connecting flight?

USER: I want to have a connection of 1.

ASSISTANT: Can you have any class preference?

USER: No, but I want to return in morning time.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Gregory Baker, no flights has been found on your planned travel dates.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for choosing us.