You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Larry Clark.

ASSISTANT: How can I assist you today?

USER: I would like to book a flight ticket from HOU to EWR, can you please help me to book a flight ticket?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, my travel dates are Jan 06 and Jan 08.

ASSISTANT: Do you have any specifications?

USER: My departing and return time is morning.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please give me a moment.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting, there are no flights found under your preferable details.

USER: That's ok, thank you for your information.

ASSISTANT: Welcome, have a great day.