You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Melissa Collins here, please book a ticket from SFO to LGA.

ASSISTANT: Sure, I will help you out in booking.

USER: Thank you.

ASSISTANT: Can you please provide me travelling dates?

USER: My preferable dates are 07/30 and 08/01.

ASSISTANT: OK, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with flight number 1000 with connection 0, can I proceed with this flight?

USER: I need a flight with connection 1.

ASSISTANT: Sorry, there are no flights found.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for choosing for services.