You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am planning for a trip with my family in HOU, can you book a flight ticket for me from LAX?

ASSISTANT: Sure, may I know your trip dates to find a flight for you?

USER: My trip dates are 11/22 and 11/24.

ASSISTANT: May I know your name?

USER: Patricia Lee here.

ASSISTANT: Sorry for the inconvenience, there is no flight for you on your route.

USER: It's not a problem, thank you.

ASSISTANT: Thank you for contacting us.