You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jacob Lewis.

ASSISTANT: How can I assist you Jacob?

USER: I am planning to visit New York to meet my friend, can you please book me a ticket from ORD to LGA?

ASSISTANT: Ok Jacob, when are you planning your journey?

USER: My preferable journey dates are from 11/05 to 11/07.

ASSISTANT: Please wait for a minute.

USER: Sure, take your own time.

ASSISTANT: There are no flights available at this moment.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Thank you for choosing us.