You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Larry Williams.

ASSISTANT: How may I assist you?

USER: Can you please book a flight ticket booking from IAH to EWR?

ASSISTANT: Sure, I will help you in booking the ticket.

USER: Thank you.

ASSISTANT: May I know your travelling dates please?

USER: I am planned my dates on 10/12 and arrival back on 10/14.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Ok, that's fine. Thank you for your help.

ASSISTANT: Thank you for choosing us.

USER: Welcome.