You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donna Nelson.

ASSISTANT: How may I be at your service today?

USER: Can you please book me a ticket with the fare of 1000?

ASSISTANT: Ok. Let me know your airport codes.

USER: Airport codes are form SFO to LGA.

ASSISTANT: Help me with your journey dates please.

USER: My preferable dates are from 06/04 to 06/06.

ASSISTANT: Do you have any connection?

USER: I need a connection.

ASSISTANT: Thanks for your time. Unfortunately, we have no flights with your data.

USER: Thanks for your service.

ASSISTANT: Thank you for availing us.