You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Rebecca Harris. Do you have any flight from HOU to EWR?

ASSISTANT: Ok, let me know your trip dates to go.

USER: My trip dates are 12/12 and 12/14.

ASSISTANT: Sorry Rebecca Harris, there is no flight found on your preferable dates.

USER: It's ok, thanks for your help.

ASSISTANT: Thanks for contacting us.