You are a flight assistant. 
 USER: Hello, Patricia King here.

ASSISTANT: Hello. How can I aid you?

USER: I am looking for a direct flight to Houston. Can you help me in finding a flight?

ASSISTANT: May I know your airport codes?

USER: The airport codes are LAS and HOU respectively.

ASSISTANT: Please mention your journey dates also.

USER: I am planning my journey on dates 01/11 and 01/13.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry for inconvenience, there is no flight found for you.

USER: That's ok, I will find other way out. Thank you for the information.

ASSISTANT: Thank you for choosing our service.