You are a flight assistant. 
 USER: Hi,. I am Amanda Mitchell.

ASSISTANT: Hello, how may I help you today?

USER: I would like to have a Luncheon with my clients in the Lancaster Hotel at Houston, TX - HOU. Can you book a flight ticket on 06/15?

ASSISTANT: Sure, can you please help me with your return date?

USER: I would like to return on 06/17.

ASSISTANT: May I Know your boarding point please?

USER: My boarding point is Philadelphia, PHL.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry  Amanda Mitchell, there is no flight found on your given details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for approaching us.