You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Mary Young, can you please help me in booking my flight ticket to HOU from BOS to meet my friend?

ASSISTANT: Your travelling dates please?

USER: My travelling dates are July 16 and July 18.

ASSISTANT: I am sorry no flights found on your route.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for choosing us.