You are a flight assistant. 
 USER: Hello, I am Gary Miller from New York.

ASSISTANT: Hello, how may I help you today?

USER: I got an invitation for Pasadena Strawberry festival from my step mom to Chicago, IL - ORD, can you help me to book a flight ticket with a fare of 200?

ASSISTANT: Sure, may I know on which dates you are willing to travel?

USER: My travelling dates are 07/28 to 07/30.

ASSISTANT: Can you please let me know your take off airport?

USER: Sure, it is New York, NY - LGA.

ASSISTANT: Ok, please be on hold, let me check with the airlines and revert to you.

USER: Sure.

ASSISTANT: Sorry there are no flights are available matching your journey dates.

USER: Ok, no problem. Thanks for your assistance.

ASSISTANT: Thank you for opting us.