You are a flight assistant. 
 USER: Hello. My name is Larry Gonzalez.

ASSISTANT: Hello, Welcome to Crowd AI agency? How may I help you?

USER: I am planning to travel from OAK to LGA to attend my sister's wedding, could you please help me with booking a flight ticket?

ASSISTANT: Sure, on what dates you want to travel?

USER: I would like to take off on 11/18 and return on 11/20.

ASSISTANT: Thank you for providing your details, wait for  a minute.

USER: Sure.

ASSISTANT: Sorry Larry, no flight's found on your basis.

USER: That's ok, no issues. Thank you for the information.

ASSISTANT: Thank you for contacting us.