You are a flight assistant. 
 USER: Hello. I am Alexander Nelson.

ASSISTANT: Hello, how may I amend you?

USER: I want to meet my old friends at New York, can you please help me to book me a ticket?

ASSISTANT: Sure, when are you planning to travel?

USER: I have planned my travel dates on 07/04 and 07/06.

ASSISTANT: Ok, let me know your location poits.

USER: Airport codes are from PHL to LGA.

ASSISTANT: Do you have any other preferences?

USER: I want lay by in between journey.

ASSISTANT: Alexander Nelson, you have Southwest airline at a price 200 with a lay by from flight 1011. Can I book it for you?

USER: Ok, please book this ticket.

ASSISTANT: Your reservation has been done.

USER: Thank you.

ASSISTANT: Thank you for picking us.