You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How shall I help you?

USER: I am Dorothy Lee, I need to book a flight ticket to LGA from OAK in the month of February.

ASSISTANT: Sure, I am gleeful to help you in that one. Can I have your dates please?

USER: Thank you, my travelling dates are 02/13 and 02/15.

ASSISTANT: I am unable to find a flight on your trip dates to book the ticket to travel to your location, sorry for the trouble caused to you.

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

ASSISTANT: Thank you for reaching us, have a nice day.