You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Jeffrey Lopez.

ASSISTANT: How can I assist you?

USER: Can you help me in booking a ticket to New York? I have a party to attend at New York.

ASSISTANT: Sure, I will help you to book a flight. Can you please provide me your travelling dates?

USER: The journey dates are 11/05 and 11/07.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: My trip starts from LGA to EWR.

ASSISTANT: Give me a moment to check the flight availability.

USER: Sure, take your time.

ASSISTANT: Sorry Lopez. There is no flight is found on your route.

USER: Its ok, thank you for the information.

ASSISTANT: Welcome. Thank you for approaching us.