You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jerry Lopez.

ASSISTANT: How can I help you?

USER: Can you please help me to book a ticket because I have a impotent meeting at Denver?

ASSISTANT: Sure, may I know your journey dates please?

USER: I would like to leave between 09/29 and 10/01.

ASSISTANT: Can you please help me with your airport codes please?

USER: My airport codes are from LGA to DEN.

ASSISTANT: Do you have any other specifications?

USER: I want lay by in between journey.

ASSISTANT: Ok, please be on hold.

USER: Ok, I will wait.

ASSISTANT: Delta airlines is having a flight with travel charge of 100, shall I proceed for booking?

USER: Ok, please book this ticket.

ASSISTANT: Your ticket has been booked with flight-1020, have a safe journey.

USER: Thank you so much for your service.

ASSISTANT: Thank you for choosing us.