You are a flight assistant. 
 USER: Hi. Catherine Roberts here.

ASSISTANT: Hello, How can I help you?

USER: I would like to book a ticket from LGA to OAK, can you please help me with that?

ASSISTANT: Sure, Please help me with your travel dates.

USER: The travel dates are from 09/29 to 10/01.

ASSISTANT: Please wait a minute.

USER: Ok, sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for opting us.